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

要理解瘋狂，必須先說它的語言。

采礦業有責任為后代留下積極的遺產。

The definition of a good mathematical problem is the mathematics it generates rather than the problem itself.

Cada palabra que escribo es un intento de alcanzar lo inalcanzable, de tocar lo intangible.

The secret of change is to focus all of your energy not on fighting the old, but on building the new.