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

Efficiency in forestry doesn't mean cutting more—it means making every tree count.

最好的交易者是那些能夠快速適應新信息的人。

"The unsaid is often more powerful than the spoken word."

我不相信貧窮，我相信創(chuàng)造機會。

合成的目標應該是盡可能簡單地制造分子，而不僅僅是可能。