youdao

It's easy to buy our food from the local supermarket, so why do we go to the trouble of growing our own?

从当地的超市买到食物很容易，那么我们为什么要自找麻烦自己种植粮食呢？

youdao

youdao

But why do we have wisdom teeth if we often need to get them removed?

VOA: special.2011.08.10

So if you had some number back in grade school like 123, well, why do we express this as 123?

在小学，像123这样的数，为什么我们要表达成123这样的呢？

哈佛公开课 - 计算机科学课程节选

Now why--and here is the question why do we get this nervousness about the relationship between what I know and how I know it arising at this moment?

问题是,为什么那时候我们对,我知道什么和我如何知道的关系如此神经紧张？

耶鲁公开课 - 文学理论导论课程节选

So why do we persist with the male mid-life crisis, talk about it, believe in it?

BBC: Viewpoint: Just what is middle age?

Why do we feel the need to boost our image by comparing ourselves with CEOs?

FORBES: Putting a Price on Mom

If the options are so far out of the money, why do we object to them?

FORBES: Not an Option