色多多在线观看播放-色多多在线观看高清免费-色多多在线观看视频-色多多在线看-欧美aaaaa性bbbbb小妇-欧美aaaav免费大片

The study of the early universe is not just about understanding the past, but also about uncovering the fundamental laws that govern all of reality.

"Great companies in the way they work, they have a culture that is unique."

可持續性已不再是一種選擇，而是我們對后代的責任。

In mathematics, the art of proposing a question must be held of higher value than solving it.

以往的事過去了便不再重提，現在的事做一件有一件的功勞，未來的事情省一件便省去許多麻煩。