同一元素的原子在质量和性质上是相同的。

Welcome, O life! I go to encounter for the millionth time the reality of experience and to forge in the smithy of my soul the uncreated conscience of my race.

One way of looking at speech is to say that it is a constant stratagem to cover nakedness.

领导力意味着今天做出艰难的决定，明天让所有人受益。