Jiang also accused developed nations of abandoning the principle reached in earlier accords, which require them to cut greenhouse gas emissions, but do not make the same requirement of developing countries.

VOA: standard.2009.12.16

And it works on the principle of trying to figure out how to make your way through the world, how to satisfy your pleasures or, in some cases, how to give up on them.

它试图在现实中找到,满足本我要求的方法，找到追求快乐的方法,有时是去找寻放弃的方法。

耶鲁公开课 - 心理学导论课程节选

And when we make these comparisons, one thing I want to point out is that we need to keep the constant principle quantum number constant, so we're talking about a certain state, so we could talk about the n equals 2 state, or the n equals 3 state.

当我们做这些比较时，我想指出的一件事是,我们需要保持常量原则,保持量子数是常数，所以我们在讨论一个确定的态时，我们可以谈论n等于2的态，或者n等于3的态。

麻省理工公开课 - 化学原理课程节选