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

Swim upstream. Go the other way. Ignore the conventional wisdom.

Not he who has much is rich, but he who gives much.

數學不知道種族或地理邊界；對于數學來說，文化世界是一個國家。

Sustainability isn't just a buzzword—it's our responsibility to future generations.

我在想，革命是不朽的。

The best art is the art that changes you.

我不會為了你舍棄世界。但是，我也不會為了世界舍棄你。