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 pursuit of science is not a luxury but a necessity for the survival of mankind.

The secret of getting ahead is getting started.

Leadership is about making others better as a result of your presence and making sure that impact lasts in your absence.

La raison n'est pas ce qui règle l'amour.

Success comes when preparation meets opportunity.

Sustainable development requires not only vision but also concrete actions.

文學是社會的鏡子，反映其美與缺陷。

可持續林業不僅僅是砍伐樹木，更是培育文明。