So that's a big help. And equilibrium happens when there isn't any possible change of state that would satisfy this.

这个非常方便，当所有的变化,都无法满足这个公式的时候,系统就达到了平衡。

麻省理工公开课 - 热力学与动力学课程节选

because it’s such a convenient, such an easy way to keep in touch with everybody.

因为这个真的可以很方便地跟大家保持联系。

便利的社交媒体 - SpeakingMax英语口语达人

But here now becomes the problem.

我这么定位这个点方便了。

麻省理工公开课 - 计算机科学及编程导论课程节选

This doesn't work. Can I meet you in some other time?

如果您觉得这个时间不方便，我能在其他时间见约你吗？”。

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