精品无码久久久久久国产_成人午夜在线视频一区_亚洲最大的av网站_亚洲欧美综合区自拍另类_91精品国产一区_日韩精品中文在线观看_一道本无吗dⅴd在线播放一区_国产精品旅馆在线_欧美午夜久久久_亚洲自拍在线观看_黑人精品xxx一区一二区_亚洲精品日韩久久久_在线视频一区二区_国产欧美久久一区二区_中文字幕精品在线视频_成人欧美在线观看

We must leave healthy waters for the next generation.

讓世界改變你，然后你就能改變世界。

The dead cannot cry out for justice. It is a duty of the living to do so for them.

The study of automata and formal languages is fundamental to understanding the limits of computation.

有時(shí)候你必須演奏很久，才能演奏得像你自己。