Be thankful when you don "t know something".

感谢你不是全知全能。

youdao

Show cheerfulness even when you don' feel it.

即使没有快乐的感觉，也要努力的表现出来。

youdao

You know you "re in love when you don" t want to fall asleep because reality is finally better than your dreams - Dr. Seuss.

“当你终于因为现实比梦境更美而无法入睡时，你恋爱了。”——苏斯博士。

youdao

The minimum wage is relatively high compared to the wage in France so it's a barrier when you don't have any qualifications and when you start your career."

VOA: standard.2009.11.12

When you don't have to worry about criteria like that ordinary, mechanical energy rules supreme, and that's dictating where equilibrium lies.

如果你不担心像这样的要求,通常的机械能就占据主要地位，并且决定平衡位于何处。

麻省理工公开课 - 热力学与动力学课程节选

It's to be used when you don't like something.

只有当你不喜欢某事的时候，才应该用这个句型。

I hate 课堂 - SpeakingMax英语口语达人

It's hard to seek help when you don't know the help is out there.

FORBES: Magazine Article

If you come up with ambitious goals, investors will be disappointed when you don't meet them.

CNN: BUSINESS

But when you don't run, your friends take you for granted and your enemies despise you.

CNN: From Protest To Politics