分类：教育/科学-外语学习
问题：Thosewhoarecontenwiththeirlifear? 
The who are conten with their life are happy .为什么life 不用复数？
回答：此句意思是"知足者常乐",life是不可数名词,意思是"生活",直译是:对生活很满足的人是快乐的".
如果life作"生命"解时,就可以用复数,如:
1000 lives were lost at the fire.有一千人在大火中丧生。