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

I’m very fearless—not in a reckless way, but in a way that is authentic to who I am.

"The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion."

反反復復地做同一件事情，不是孩子天生就喜歡的，但是在重復的過程中，孩子熟能生巧。

The real tragedy of the poor is that they can afford nothing but self-denial.

質量是企業的生命線。

在數學中，提出問題的藝術必須比解決問題更有價值。