These ideas can be described without the aid of formulae, so why use them?

这些观点并不是非得有公式才能讲清楚啊，为什么一定要用这些公式呢？

youdao

Yes, I see them in the text just as anybody else does, but since I don't really know what they mean except by means of the translation, why should I use them?

我看着这些原版书，但是我也不懂他们真正什么意思,除了它们翻译过来的意思，所以我干嘛费劲去用俄语？

耶鲁公开课 - 文学理论导论课程节选

If chips are as hot as power stations, the thinking goes, why not use them as such?

ECONOMIST: Monitor

Since, according to the study described above, consumer reviews are more trusted than the most reliable professional reviews, why not use them everywhere?

FORBES: Got Reviews? If Not, You're Doomed!

If airline pilots use tablets for maps, Johnson said, why shouldn't teams use them for game shots and possibly video?

WSJ: Why Is the NFL Afraid of Technology?