爱情中的欢乐和痛苦是交替出现的。

We teach a subject not to produce little living libraries on that subject, but rather to get a student to think mathematically for himself.

跨国合作对于解决全球粮食挑战至关重要。

The only thing that can make you a hero is your heart.

爱是感官的诗歌。

常想到会悔恨终生，就不能不尽孝心；常想到度日的艰难，就不得不节约费用；常想到人的生命脆弱，就不得不珍惜心神；常想到世态人情，就不得不立志奋发；常想到法网恢恢，疏而不漏，就不能让自己胡作非为；常想到生命易失，就不得不忍气耐性。