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

"We are all of us made by what we have lost as much as what we have gained."

Short-term gains should never compromise long-term environmental health.

The moment you stop learning is the moment you stop growing.

譯文：總想著對自己有利，反而會害了自己；能夠屈居人下，終有一天能居于人上。賞析：凡事多替別人著想，就是給自己積福，如果我們只謀求自己的個人利益，必將招致禍患。我們身處困境，要學會忍耐，懂得發憤圖強，終有一天會令別人刮目相看。

在數學中，真理不是通過共識而是通過證明來發現的。