Why is it necessary to sigh-off gentleman.

人生能有几回搏，君子何须叹离合。

youdao

Why is it necessary to have top class coaches?

为什么需要有最高水平教练人员?。

youdao

Why is it necessary to explain the directivity of thoughts and provide clues?

为什么让别人感受到，为什么会有自我的思维指向和线索？

youdao

Why is it necessary to rend something, to make it soul or whole? Is it necessary?

为什么要撕破某样东西，它才能完美呢，这有必要吗？

耶鲁公开课 - 现代诗歌课程节选

Here, too, gets a little ugly and this is why I tend not to like this construct, at least in C, but sometimes it's necessary or it's the simplest way to achieve this goal.

这里也有点难看的，这也是为什么我,不太喜欢这个结构，至少在C语言中，但是有时它是必须的,或者它是达到目标最简单的方法。

哈佛公开课 - 计算机科学课程节选

To understand why, it is necessary to take a little tour of the Arab world.

CENTERFORSECURITYPOLICY: Israel and Arab Democracy

This is why it is necessary for the government to run large deficits.

CNN: Look beyond the fiscal cliff

People are asking why it is necessary to hoard weapons when they could only be used against Tony Blair who is one of our strongest allies, someone who is on television here a lot and who seems to many people to be a reasonable man?

ECONOMIST: Northern Ireland