精品无码久久久久久国产_成人午夜在线视频一区_亚洲最大的av网站_亚洲欧美综合区自拍另类_91精品国产一区_日韩精品中文在线观看_一道本无吗dⅴd在线播放一区_国产精品旅馆在线_欧美午夜久久久_亚洲自拍在线观看_黑人精品xxx一区一二区_亚洲精品日韩久久久_在线视频一区二区_国产欧美久久一区二区_中文字幕精品在线视频_成人欧美在线观看

事物背后必定隱藏著某些極為深?yuàn)W的東西。

追求知識不僅僅是尋找答案，更是提出正確的問題。

The essential function of art is moral.

歷史是對于未來最好的老師。歷史書中的答案價(jià)值萬金。

The ability to create and sustain large, complex organizations is one of the key factors that distinguish successful societies from unsuccessful ones.

If you are really in love, you talk with your eyes.