Because there's probably no right answer here, but why might this approach be better? Yeah?

因为这里没有一个固定的答案，但是为什么这个方法更好点呢？，你说？

哈佛公开课 - 计算机科学课程节选

In fact, I do this as well, I mean I have water with me and I have no idea why because I'm not particularly dehydrated.

事实上,我也整天带着水壶,我是说我随身带水,但又不知道为什么要带,因为我并没有特别的脱水症状

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

There's not going to be a hearse. Why not? There's no body!

就连灵车都不会有，为什么呢？，因为没有尸体！

耶鲁公开课 - 弥尔顿课程节选

Why? Because they didn't ask the question that they needed to ask,which was,in that particular case, the salutogenic question: why do some individuals succeed ? despite unfavorable circumstances?

为什么呢？因为他们没有提出这样的问题,这特定情况下，他们应该问这个问题，这个健康本源的问题，为什么有些人,成长环境恶劣，依然能成功？

哈佛公开课 - 幸福课课程节选

Why not? Well, they can't get data, there wasn't a stock market.

为什么呢,因为作者无法得到数据,两国没有股票市场

耶鲁公开课 - 金融市场课程节选

Nobody can see the interest rate-- why the interest rate's at the level it is in the market-- because nobody can see all these individuals; but that's why the interest rate gets determined and is in equilibrium.

没有人能知道,为什么市场利率会是现在的结果,因为没有人能知道其他人的想法,但市场利率就是这样确定并达到均衡

耶鲁公开课 - 金融市场课程节选