“为什么是现在？”她困惑地思忖。

'Why now?' she wondered hazily.

《牛津词典》

但为什么是现在，父亲？

But why now, Father?

youdao

她问道：“为什么是现在？”

She asked, "Why now?"

youdao

Why is cancer one of the leading killers in the U. S. now but wasn't even on the charts in 1665?

为什么癌症现在是美国人的头号杀手,却甚至没有在一六六五年的名单中出现

耶鲁公开课 - 生物医学工程探索课程节选

All right. So now that we have a general idea of what we're talking about with shielding, we can now go back and think about why it is that the orbitals are ordered in the order that they are.

现在我们对于谈论的屏蔽,有一个整体观点了，我们现在可以回过头来考虑,为什么轨道是按照,那种规则排列的。

麻省理工公开课 - 化学原理课程节选

Right now it's a simple template, but it's a template for creating what a class looks like, and I now have an x- and y- value associated with each instance of this.

那么大家明白了为什么，我说类是一个模板了，对不对？,现在它只是一个简单的模板，但是它是一个用来-,创建形成一个类的模板。

麻省理工公开课 - 计算机科学及编程导论课程节选