虽然今天发生的这起惨案的原因还无从得知，但可以肯定的是要回答这些问题没有那么简单。

No one yet knows what is behind today's attack, but there are rarely easy answers to all this.

youdao

如果拥有商业网站，你需要回答这个问题，因为这关系到网站收益。

If you have an ecommerce web site, you need the answer to that question. Your profits depend on it.

youdao

这和你要回答的问题有关吗？你为什么不正面回答我？

What does this have to do with questions you should answer?

youdao

We can move things around and it's far more exciting for me to answer your questions than to have a monologue.

我们可以稍作调整,而且回答你们的问题,要比我这一个人干讲有意思多了

耶鲁公开课 - 基础物理课程节选