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

"Language is a tool, and like any tool, it can be used for good or for ill."

RNA干擾是一個迷人的過程，它為理解基因調控開辟了新的途徑，并具有潛在的治療應用。

The theory of probabilities is at bottom nothing but common sense reduced to calculus.

We are all born mad. Some remain so.

我們這個時代的挑戰是創造一個可持續的能源未來。