The decline of violence may be the most significant and least-appreciated development in the history of our species.

I'm not angry anymore, I'm just tired.

【释义】敬爱他人的人，他人也会敬爱他；尊敬他人的人，别人也会尊敬他。

人民幸福的首要条件是废除宗教。

遗传密码的发现是理解生命分子基础的一个里程碑。

Sometimes we stare so long at a door that is closing that we see too late the one that is open.