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

最好的林業(yè)實(shí)踐是那些不留痕跡但改變一切的做法。

Innovation distinguishes between a leader and a follower.

The use of a program to prove the 4-color theorem will not change mathematics - it merely demonstrates that the theorem, a challenge for a century, is a finite problem.

清晰的愿景將障礙轉(zhuǎn)化為墊腳石。

I believe in the power of dreams. Dreams are what drive us forward.

你看不見真正的你，而你所見的只是你的影子。