一個(gè)民族的歷史，本質(zhì)上是其統(tǒng)治階級的歷史。
元素周期表不僅僅是一張圖表，它是無限可能的地圖。
In times of change, the ability to adapt and remain agile is what separates the winners from the losers.
It must be remembered that while sympathy with joy intensifies the sum of joy in the world., sympathy with pain does not really diminish the amount of pain. It may make man better able to endure evil, but the evil remains.
我們使用的詞語就像我們穿的衣服。它們可以讓我們看起來聰明或愚蠢，善良或殘忍，堅(jiān)強(qiáng)或軟弱。