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She knew a lot about food...
她对食物很在行。
包含;目的是;为了
When you mention the things that an activity or institution is about, you are saying what it involves or what its aims are.
Leadership is about the ability to implement change.
领导才能就是要有实施变革的能力。
对…表示（情绪或心态）
You use about after some adjectives to indicate the person or thing that a feeling or state of mind relates to.
'I'm sorry about Patrick,' she said...
“我为帕特里克感到难过，”她说。
I feel so guilty and angry about the whole issue.
我对整件事深感内疚和气愤。
针对（问题）
If you do something about a problem, you take action in order to solve it.
Rachel was going to do something about Jacob...
蕾切尔将对雅各布有所行动。
He said he'd ask Nina for a divorce, but he never did anything about it.
他说会跟尼娜提出离婚，可是他却从未付诸实际。
（某人或某事物）具有（某种特性）
When you say that there is a particular quality about someone or something, you mean that they have this quality.
There was a warmth and passion about him I never knew existed...
他身上有一股我从不知道的热情和激情。
I think there's something a little peculiar about the results of your test.
我认为你的化验结果有点不对劲。
About is used in front of a number to show that the number is not exact.
In my local health centre there's about forty parking spaces...
我们本地的保健中心约有40个停车位。
The rate of inflation is running at about 2.7 percent.
通货膨胀率大约为2.7%。
四下；到处
If someone or something moves about, they keep moving in different directions.
Everyone was running about.
大家都在跑来跑去。
围绕；环绕
If you put something about a person or thing, you put it around them.
Helen threw her arms about him...
海伦张开双臂拥抱他。
She was elegantly dressed with a double strand of pearls about her neck.
她着装典雅，搭配着一条双层珍珠项链。
在手头的;现成的;能得到的
If someone or something is about, they are present or available.
There's lots of money about these days for schemes like this.
近来这类计划资金充足。
即将（做…）的；快要（发生…）的
If you are about to do something, you are going to do it very soon. If something is about to happen, it will happen very soon.
I think he's about to leave...
我看他要走了。
Argentina has lifted all restrictions on trade and visas are about to be abolished...
阿根廷已经取消所有贸易限制，签证制也将废止。
（尤指一段时间无法自由行动后）四处走动，外出活动
If someone is out and about, they are going out and doing things, especially after they have been unable to for a while.
Despite considerable pain she has been getting out and about almost as normal...
尽管还很痛，她已经基本上行动如常。
The regulations were relaxed and the prisoners could get out and about a bit.
规定有所放宽，犯人可以出去短暂放风。
（常因工作）奔波
If someone is out and about, they are going to a lot of different places, often as part of their job.
They often saw me out and about.
他们经常看见我四处奔波。
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He took a puff on his pipe and shook his head.
他抽了口烟斗，摇了摇头。
头脑;心智;才智
You can use head to refer to your mind and your mental abilities.
I can't get that song out of my head.
那首歌在我脑海中挥之不去。
...an exceptional analyst who could do complex maths in his head.
会心算复杂数学题的杰出分析家
（队伍中的）领头位置;队首;排头
The head of a line of people or vehicles is the front of it, or the first person or vehicle in the line.
...the head of the queue...
We took our place at the head of the convoy.
我们排在护送队伍的最前面。
排在（队列等）的最前面
If someone or something heads a line or procession, they are at the front of it.
The parson, heading the procession, had just turned right towards the churchyard.
走在行进队伍最前面的教区牧师刚刚向右转弯，朝着教堂墓地走去。
居…之首;在…名列首位
If something heads a list or group, it is at the top of it.
Running a business heads the list of ambitions among the 1,000 people interviewed by Good Housekeeping magazine.
在《好管家》杂志采访过的1,000人中，创立自己的公司在理想抱负中列在首位。
The head of something is the highest or top part of it.
...the head of the stairs...
楼梯的顶部
Every day a different name was placed at the head of the chart.
每天都有一个不同的名字被列在这张表的最上端。
（细长物体的）头部，顶端
The head of something long and thin is the end which is wider than or a different shape from the rest, and which is often considered to be the most important part.
There should be no exposed screw heads...
螺钉顶端不应该外露。
Keep the head of the club the same height throughout the swing.
整个挥杆过程中要使杆头始终保持在同一高度。
（中小学的）校长
The head of a school is the teacher who is in charge.
She is full of admiration for the head and teachers.
她对校长和教师们满心钦佩。
（公司、组织的）负责人，领导人，首脑，长，主任
The head of a company or organization is the person in charge of it and in charge of the people in it.
Heads of government from more than 100 countries gather in Geneva tomorrow.
来自100多个国家的政府首脑明日将齐聚日内瓦。
...the head waiter.
掌管;主管;负责
If you head a department, company, or organization, you are the person in charge of it.
...Michael Williams, who heads the department's Office of Civil Rights.
负责该部民权处的迈克尔·威廉斯
...the ruling Socialist Party, headed by Dr Franz Vranitzky.
由弗朗兹·弗拉尼兹基博士领导的执政社会党
The head of an infected spot is its white or yellow centre.
（啤酒表层的）泡沫;酒头
The head on a glass of beer is the layer of small bubbles that form on the top of the beer.
（表示牲畜的数目）头
You can use head to say how many animals of a particular type a farmer has. For example, if they have fifty head of cattle, they have fifty cows.
If you have a bad head, you have a headache.
I had a terrible head and was extraordinarily drunk.
我头很痛，已经酩酊大醉。
（硬币的）有人头像的一面，正面
If you toss a coin and it comes down heads, you can see the side of the coin which has a picture of a head on it.
'We might toss up for it,' suggested Ted. 'If it's heads, then we'll talk.'...
“我们可以掷硬币来决定。”特德建议道，“如果是正面，我们就谈谈。”
Heads or tails?
你猜是正面还是反面？
朝着（某一地点）行进（美国英语中亦作 are headed）
If you are heading for a particular place, you are going towards that place. In American English, you can also say that you are headed for a particular place.
He headed for the bus stop...
他朝着公共汽车站走去。
...an Iraqi vessel heading for the port of Basra...
开往巴士拉港的一艘伊拉克船
很可能要遭受，会招致（美国英语中亦作 is headed for）
If something or someone is heading for a particular result, the situation they are in is developing in a way that makes that result very likely. In American English, you can also say that something or someone is headed for a particular result.
The latest talks aimed at ending the civil war appear to be heading for deadlock...
为结束内战而进行的最新谈判好像要陷入僵局。
He said anyone giving orders without respecting the wishes of his people is heading for disaster...
他说任何不尊重人民意愿而发号施令的人都注定会走向灭亡。
If a piece of writing is headed a particular title, it has that title written at the beginning of it.
One chapter is headed, 'Beating the Test'.
有一章的标题为“战胜考试”。
（足球比赛中）用头顶（球）
If you head a ball in football, you hit it with your head in order to make it go in a particular direction.
He headed the ball across the face of the goal.
他一个头球，球从球门前横飞而过。
You use a head or per head after stating a cost or amount in order to indicate that that cost or amount is for each person in a particular group.
This simple chicken dish costs less than ?1 a head...
这道简单的鸡肉菜肴每人的花费还不到1英镑。
Ethiopia, for instance uses the equivalent of just twenty kilos of oil per head a year.
比如说，埃塞俄比亚每年的人均消费支出仅相当于20公斤的石油。
让人生气;让人沮丧
If something or someone does your head in, they make you angry or frustrated.
Living with my parents is doing my head in.
和父母住在一起让我很沮丧。
从头到脚;全身
From head to foot means all over your body.
Colin had been put into a bath and been scrubbed from head to foot.
科林被放进浴缸，从头到脚仔仔细细洗了个干净。
If you have a head for something, you can deal with it easily. For example, if you have a head for figures, you can do arithmetic easily, and if you have a head for heights, you can climb to a great height without feeling afraid.
I don't have a head for business.
我没有生意头脑。
...an extraordinarily effective organiser with a remarkable head for figures.
很有算术头脑、工作效率极高的组织者
充分理解并接受;打定（主意）
If you get a fact or idea into your head, you suddenly realize or think that it is true and you usually do not change your opinion about it.
Once they get an idea into their heads, they never give up.
一旦接受了一个想法，他们就永远不会放弃。
If you say that someone has got something into their head, you mean that they have finally understood or accepted it, and you are usually criticizing them because it has taken them a long time to do this.
Managers have at last got it into their heads that they can no longer accept inefficient operations.
管理者们终于意识到自己不能再安于低效率的运营了。
让…自由行动;对…不加约束
If you give someone their head, you allow them to do what they want to do, without trying to advise or stop them.
He recognised ability and gave people their heads.
他发现别人的才能，并且让他们自由发挥。
（酒）使人感到醉，上头
If alcoholic drink goes to your head, it makes you feel drunk.
That wine was strong, it went to your head.
那酒劲儿很大，喝了会上头。
（赞扬或成功）冲昏…的头脑，使…骄傲自满
If you say that something such as praise or success goes to someone's head, you are criticizing them because you think that it makes them too proud or confident.
Ford is definitely not a man to let a little success go to his head.
福特绝对不是那种会被一点点成功冲昏头脑的人。
If you are head over heels or head over heels in love, you are very much in love.
I was very attracted to men and fell head over heels many times.
我很容易被男性吸引，曾多次深陷情网。
保持镇静/张皇失措
If you keep your head, you remain calm in a difficult situation. If you lose your head, you panic or do not remain calm in a difficult situation.
She was able to keep her head and not panic...
她设法保持镇静，没有陷入恐慌。
She lost her head and started screaming at me.
她惊慌失措，开始向我大声尖叫。
If you knock something on the head, you stop it.
When we stop enjoying ourselves we'll knock it on the head.
等玩够了，我们就会结束。
（表示强调）大笑/大声尖叫
Phrases such as laugh your head off and scream your head off can be used to emphasize that someone is laughing or screaming a lot or very loudly.
He carried on telling a joke, laughing his head off.
他继续讲笑话，自己笑得前仰后合。
（吸毒后）昏头昏脑的，神志不清的
If you say that someone is off their head, you mean that they have taken so many drugs that they do not know what they are doing.
昏了头的;愚蠢的
If you say that someone is off their head, you think that their ideas or behaviour are very strange, foolish, or dangerous.
He's gone completely off his head.
他已经完全昏了头了。
倒过来想;从全新的角度理解
If you stand an idea or argument on its head or turn it on its head, you think about it or treat it in a completely new and different way.
Their relationship turned the standard notion of marriage on its head.
他们的关系完全颠覆了传统的婚姻观念。
超过…的理解力
If something such as an idea, joke, or comment goes over someone's head, it is too difficult for them to understand.
I admit that a lot of the ideas went way over my head.
我承认那些想法中有很多远远超出了我的理解力。
未与…商量地;(尤指)越级
If someone does something over another person's head, they do it without asking them or discussing it with them, especially when they should do so because the other person is in a position of authority.
He was reprimanded for trying to go over the heads of senior officers.
他因试图越过高层官员自作主张而受到斥责。
（不好的事情）再次出现，重新抬头
If you say that something unpleasant or embarrassing rears its ugly head or raises its ugly head, you mean that it occurs, often after not occurring for some time.
There was a problem which reared its ugly head about a week after she moved back in...
她搬回来大约一周之后，一个问题又重新出现了。
The scourge of racial tyranny should never again be allowed to raise its ugly head.
永远不能让种族主义暴政的祸患重新抬头。
倒立;竖蜻蜓
If you stand on your head, you balance upside down with the top of your head and your hands on the ground.
理解;弄明白
If you say that you cannot make head nor tail of something or you cannot make head or tail of it, you are emphasizing that you cannot understand it at all.
I couldn't make head nor tail of the damn film.
这部该死的影片我一点儿都看不懂。
突然决定（做某事，尤指古怪或愚蠢的事）；心血来潮
If somebody takes it into their head to do something, especially something strange or foolish, they suddenly decide to do it.
He suddenly took it into his head to go out to Australia to stay with his son.
他突然心血来潮，打算去澳大利亚和儿子一起住。
到了危急关头;到达关键点
If a problem or disagreement comes to a head or is brought to a head, it becomes so bad that something must be done about it.
These problems came to a head in September when five of the station's journalists were sacked.
这些问题在9月变得十分尖锐，当时该台有5名记者遭到辞退。
If you bang peoples' heads together or knock their heads together, you tell them off severely for doing something wrong or for not doing something they were asked to do.
It is now high time he banged his colleagues' heads together.
现在该是他敲打敲打同事们的时候了。
集体商讨;集思广益
If two or more people put their heads together, they talk about a problem they have and try to solve it.
So everyone put their heads together and eventually an amicable arrangement was reached.
因此大家集思广益，最终作出了妥善的安排。
（尤指在生意方面）勉强逃脱困境
If you keep your head above water, you just avoid getti used especially to talk about business.
We are keeping our head above water, but our cash flow position is not too good.
我们正努力避免陷入困境，但我们的现金流动情况不太好。
有人会遭殃，有人会（因此）受到惩罚（尤指被解雇）
If you say that heads will roll as a result of something bad that has happened, you mean that people will be punished for it, especially by losing their jobs.
The group's problems have led to speculation that heads will roll.
已经有人猜测，该集团的问题会导致一些人被解雇。
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i请填写生词本名称!From Wikipedia, the free encyclopedia
top (table of processes) is a
program found in many
operating systems that displays information about CPU and memory utilization. It produces an ordered list of running processes selected by user-specified criteria, and updates it periodically. Default ordering is by
usage, and only the top CPU consumers are shown. top shows how much processing power and memory are being used, as well as other information about the running processes. Some versions of top allow extensive customization of the display, such as choice of columns or sorting method.
There are several different versions of top. The traditional Unix version was written by William LeFebvre and originally copyrighted in 1984. It is hosted on , and release 3.7 was announced in 2008.
The Linux top version is part of the
group of tools. It was originally written by Roger Binns but shortly thereafter it was taken over by others.
top is useful for , as it shows which users and processes are consuming the most system resources at any given time.
On , the roughly equivalent program is prstat. MS-DOS has
and graphical Microsoft operating systems have the .
has an updating running processes list as part of the topas and topas_nmon commands.
The load average numbers in Linux refers to the sum of the number of processes waiting in the run-queue plus the number currently executing. The number is absolute, not relative. A unlike utilization. The instant variations of the number of processes are
formula which is calculated using
program is similar to top, but instead produces a snapshot of processes taken at the time of invocation.
interactive system-monitor for Linux
system-monitor for AIX and Linux
. Unix Top.
LeFebvre, William (). . Unix Top.
. SourceForge.
. Linux Documentation.
Binns, Roger. . Roger's world.
J. Gunther, Neil (2010).
(PDF). teamquest.com.
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