I really don't see why I should have to explain myself to you.

我真不明白我为什么非要向你解释我的行为不可。

《牛津词典》

I don't see why you should do so.

我不明白为什么你非这样做不可。

youdao

Your web application is a different application, and I don't see why you want any of our code.

你的网站是另一个程序, 我不明白你为什么需要我们的代码?

youdao

What, you think I regret saving you? I can see that you do.I just... I don't know why.

VOA: standard.other

I simply want to point out enough about the problem to help you see why I don't think free will is a slam-dunk for the soul.

我只是想尽可能地,把这个问题提出来,以帮助你们认识到,为什么我不认同自由意志是灵魂的制胜利器

耶鲁公开课 - 死亡课程节选

"I don't see though why it has to be a big deal - today you live in one country, tomorrow you move to the other and in the future you might come back".

BBC: A tale of two Russians