必须的

For REs, which are compared many times during the course of execution, we highly recommend using precompilation first because, again, REs have to be compiled anyway, so doing it ahead of time is prudent for performance reasons. re.compile provides this functionality.

由于正则表达式在执行过程中被多次用于比较，我们强烈建议先对它做预编译，而且，既然正则表达式的编译是必须的，那使用么预先编译来提升执行性能无疑是明智之举。re.compile 就是用来提供此功能的。

Transferor trustee if it is so required, solely for the purpose of processing this transfer.

丰人寿保险有限公司向转移受托人索取有关本人之强积金账户的所须资料并就本表格作出任何必须的修正，以及於有需要的情况下

The resistor is necessary because the TV is AC coupled and will slowly charge up and cut off the audio.

这个电阻是必须的，因为电视使用的是交流电，这会在信号线之间缓慢的充电，并最终阻断音频信号。

These lessons provide you with the essential tools you need in order to take command of your life.

这洗东西给你提供了一些重要的也是你必须的工具，你可以用他们来掌握你的生活。

It is a must to work hard, carefully prepare and come out to the audience in the best shape, with a clear heart and mind.

努力，小心的准备和带着清醒的心和脑，在最佳状态迎接观众，这三点是必须的。

He alleges that his department took five months to provide him with the oil necessary to his research.

他申辩说，系里为提供他的研究必须的机油，用了整整五个月的时间。

It shall be necessary to both understand the bodily polarities and to accept them, repeating in a chemical/physical manifestation the work you have done upon the mind bethinking the consciousness.

同时了解身体的极性并且接受它们是必须的，你对心智所做的功将会重复地在化学/生理上显现。

The Buggy Ammo upgrade is pretty much a necessity though, or you'll need a large amount of Buggies to get a full-health Bus bunkered in one volley.

火箭吉普的弹药升级是很必须的，或者你将会需要更大量的火箭吉普去在一次齐射之内干掉巴士。

ABSTRACT: We reviewed the problems of environment and resource constrains in the evolution of urban transport.

文章首先回顾了世界上城市交通发展存在的环境和资源问题。即便是在发达国家，很大一部分小汽车的出行并非是必须的。

It was customary, regarded as vitally necessary, for girls to be indoctrinated to the most severe and restrictive of corsets, which they referred to as stays.

这种习惯被认为是绝对必须的，女孩们被灌输这样的信念：最严厉、最具限制性的束衣是一种支撑。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。