Recently,AMISOM has begun taking a more active role in the conflict, patrolling far beyond their bases, and at one point, fighting alongside government forces.

VOA: standard.2009.08.21

Is there a certain point beyond which I become happy?

是不是存在一个点，超过之后就变幸福了？

哈佛公开课 - 幸福课课程节选

There are more people who can work to increase the production, but beyond that point there are more people to feed than the production can produce, and that leads to a desire for expansion of the land available for cultivation.

越来越多的人从事工作,生产力得以提高,但是一旦突破临界值,花费就要超过所得了,它导致了对土地扩张的需求

耶鲁公开课 - 古希腊历史简介课程节选