你真的要离开吗？因为我想要的一切就是你能出现在我的门前。

The interplay between discrete and continuous mathematics is where some of the most interesting problems lie.

"What good's an opinion if you don't know?"

Attosecond science allows us to capture the fastest motions in the microcosm, like freezing the wingbeat of a hummingbird.

若要优美的嘴唇，要讲亲切的话。