例句：
The contract was stated to be invalid.
那份合同宣布作废。
We talked about the contract, pay, etc.
我们讨论了合同、工资等问题。
The contract was declared null and void.
合同被宣布无效。
Such classification tends to detract from generality.
这样的分类方法缺乏概括性。
Such classification tends to detract from generality .
这样的分类方法缺乏概括性。
Detract not from others, neither be excessive in commanding.
不要贬低别人，也不要过分抬高自己。
We had to hype the film to attract the financiers.
我们不得不大肆炒作这部影片以吸引金融家们。
The race organizers are trying to attract sponsors.
比赛的组织者在想方设法吸引赞助者。
Films with big stars always attract great attention.
有大明星演出的电影总是引起很大的兴趣。
The following extract is taken from her new novel.
下面一段摘自她的新小说。
They are unlikely to extract much benefit from the trip.
他们不大可能从这次旅行中获得多大益处。
This type of surgery could even be used to extract cancerous growths.
这类外科手术甚至可以用来摘除恶性肿瘤。
You can't retract what you have said.
你不能收回已说过的话。
Retract your words!
收回你的话！
A ladybug can retract its head into its body.
瓢虫可以将自己的头缩回到躯体中去。
I should wish now to protract this moment ad infinitum; but I dare not.
我想我是在美梦中呓语，我真想把眼前这一刻adinfinitum延长，但我不敢。
Protract 20 detailed tables, which make the research object more concrete.
绘制了较为精细的.图表二十张，使研究对象更为直观明了。
Delay always breeds danger, and to protract a great design is often to ruin it.
推迟经常孕育危险，拖延一个伟大的工程常常意味着毁灭它。
Don't speak in such abstract terms.
不要用这样抽象的术语来说。
It is the abstract vitality of our speech.
它是我们语言抽象的生命力。
Most of these methods, however, are not abstract.
但是这些方法大多数不是抽象的。
But don't let that distract you.
但是，别让这些分心。
They can both distract and reward you.
它们可以分散你的注意力并且让你受益其中。
You can distract yourself.
你只能使自已分心一会儿。
Add up all the pleasures, subtract all the pains.
把所有快乐加起来减去所有痛苦。
You also learn how to add and subtract in your head.
你也应该学会加减法的心算。
The little girl has begun to learn to add and subtract.
这小女孩已在学做加减法了。