To be brave is to love someone unconditionally, without expecting anything in return.
永遠(yuǎn)不要停止學(xué)習(xí)，因?yàn)槭澜缬肋h(yuǎn)不會(huì)停止變化。
我不需要運(yùn)氣，我自己創(chuàng)造運(yùn)氣。
The best way to predict the future is to create it.
Parental investment is the key to understanding sex differences in mating strategies.
NP完全性的概念為理解計(jì)算問題的復(fù)雜性提供了一個(gè)強(qiáng)大的工具。