Everyone knows about principles of life,but it`s too hard to control blue mood.

大道理是人人都懂，小情绪却是难以控制。

principle n. 原则，原理

control v.控制

principle

a moral rule or a strong belief that influences your actions 道德原则；行为准则；规范

He has high moral principles.

他很有道德。

a belief that is accepted as a reason for acting or thinking in a particular way 观念

the principle that free education should be available for all children

所有儿童都应该能享受免费教育的观念

a general or scientific law that explains how sth works or why sth happens 定律；工作原理

the principle that heat rises

热气上升的定律

昨日翻译答案：Why not tell this news to your colleague?

今日翻译练习：Under no circumstances can we agree to such a principle.

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