有两种自由——一种虚伪的自由,一个人可以为所欲为;一种真正的自由,一个人可以为所应为。
The most exciting aspect of chemistry is the ability to create new molecules that have never existed before.
最好的机会往往出现在市场低迷时期。
"The power of words lies not in their meaning, but in their ability to evoke emotions."