我们为什么不过去亲自看看呢？

Why don't we walk over there and see for ourselves?

youdao

你为什么不过来呢？

Why don't you come over?

youdao

老是过西方的情人节，为什么不过我们自己的情人节呢？在这美好的日子里我们一起过好吗？我等你！

Has always been the Western Valentine's day, why we do our own Valentine's day? In this beautiful day with us too, okay? I'll wait for you!

youdao

So, again, this is why I'm disclaiming that this isn't all that interesting yet, but what am I doing.

此外，这就是为什么我放弃那个，这个不是那么,有趣，不过我现在在做什么呢？

哈佛公开课 - 计算机科学课程节选

Yeah. That will be fine but why don't you want to go?

也可以啊，不过你为什么不想出去吃呢？

Is it okay 实战 - SpeakingMax英语口语达人

This was known for a long time, but it took Mr. Einstein to figure out why nature is behaving in that fashion.

这一点在很早以前就人所共知了,不过是爱因斯坦先生解释了,大自然为什么以这种模式运行

耶鲁公开课 - 基础物理课程节选