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

Coal has powered our past, but we must be honest about its role in our future.

The way in which men produce their means of subsistence depends first of all on the nature of the actual means they find in existence and have to reproduce.

不斷追求智慧，是人生的最高目標。

領導力不是發號施令，而是激勵他人成就偉大。

寫作是從無到有創造東西的一種方式。