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

Natural laws govern everything.

The challenge of leadership is to be strong, but not rude; be kind, but not weak; be bold, but not bully; be thoughtful, but not lazy; be humble, but not timid; be proud, but not arrogant; have humor, but without folly.

質量不是權利；它是一種特權。

讀書貴在能有疑問，有疑問方能增進對事物的了解。

追求知識是一段永無止境的旅程，每一個發現都為新的問題打開了大門。

我不會接受否定的答案。