There is no reason why love shouldn't cross the age barrier.

爱情没有理由不应跨越年龄障碍。

《柯林斯英汉双解大词典》

There is no reason why you couldn't live it up once in a while.

没有理由不让你偶尔尽情玩乐一下的。

《柯林斯英汉双解大词典》

There's no earthly reason why you shouldn't go.

你完全没有理由不去。

《牛津词典》

Robert Fulton would say for the rest of his life that he had no idea why he said such a thing.

VOA: special.2009.01.14

In terms of why universities need Muslim chaplains, when I was at NYU as an undergrad, we had no central authority to figure.

就大学为什么需要穆斯林教士而言，当我还是纽约大学的学生时，我们没有一个核心领导。

普林斯顿公开课 - 人性课程节选

But, in economic terms, there's no difference between losing the tickets and losing $400, so why do you behave differently?

但是，从经济学角度上看,丢了票和丢了400美元没有什么不同，但你为何会做出不同的反应呢？

耶鲁公开课 - 金融市场课程节选

And from it we can see very clearly why no ones gone to jail, why no one has even been prosecuted over the largest UK bank failure ever.

FORBES: Why There's No One in Jail Over Royal Bank of Scotland

This is one reason why no euro-scrap has erupted between the big parties and why Germany has had no real national debate on the issue.

ECONOMIST: The race begins

The geocentric theory offered no explanation why the planets were revolving in these circles and offered no plausible picture of the universe as a whole.

FORBES: Why The Paradigm Shift In Management Is So Difficult