1.
One day a neighbor asked him,"To what do you attribute your good health and longevity."
一天，一位邻居问他，“你认为健康长寿的原因何在？”
2.
Christianity failed to spread in China. Why?
基督教未能在中国广泛传播，原因何在?
3.
Carrie sensed the root of the opposition at once.
嘉莉马上看出了她反对的原因何在。
4.
Your reply quite overdue whet prevent you.
你方回在电太迟，是何原因。
5.
In the lab, however, scientists are beginning to find out why.
然而，在实验室中，科学家们开始了解到原因何在。
6.
It is difficult to relate these results with any known cause.
这些结果很难与任何已知的原因联系在一起。
7.
The reason for their success is that they knew how to study.
他们成功的原因在于他们知道如何学习。
8.
Why this should have been so will perhaps emerge in the course of my account.
何以会如此的原因，也许可以在我的叙述里看到。
9.
That's (the reason) why he cried.
那就是他为何哭的原因。
10.
all risks whatsoever
不论任何原因的一切险
11.
An Analysis of the Causes of the Failure of Modern Science to Develop in China in Recent Times
对近代科学何以未在中国产生之若干原因的分析
12.
"Much of your mythology is lost, and what is not lost is scattered and difficult to trace. Why is this? "
中国神话散佚很多，仅存的文献又很分散，难以寻查。原因何在?
13.
Next time you see someone fall, think about why and offer a helping hand.
当你下次看到有人摔倒的时候，想想原因何在，再去助人一臂之力吧。
14.
Whatever the causes for the great betrayal of 1919-20, the consequence remained.
不管1919到1920年这场大背叛的原因何在，其后果犹存。
15.
Scientists are investigating to find out the cause of the crash/are investigating how the crash occurred.
科学家们正在调查失事的原因[事故是如何发生的].
16.
Never make a mistake without asking yourself why. Learn from your trading mistakes.
不要犯了错而不问自己原因何在。应该从交易失误中学习经验。
17.
It is the reason why the output of a machine is less than the input that there is always friction in any machine .
任何机械中总存在着摩擦，这就是机器的输出小于输入的原因。
18.
This is why she looked so radiant at the NUT dinner.
这就是她为何在全国教师工会的宴会上显得如此精神焕发的原因。