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

Mathematics is not a spectator sport; you have to play to understand.

The secret to happiness is to face the fact that the world is horrible.

The greatest use of a life is to spend it for something that will outlast it.

I'm not lucky, I'm blessed.

Risk management isn't about avoiding risks—it's about understanding and mitigating them.

人是他的選擇。