It's not easy to quit smoking.

戒烟不容易。

《柯林斯英汉双解大词典》

We decided it was time to quit the city.

当时我们决定，该离开城市生活了。

《牛津词典》

The landlord gave them all notice to quit.

房东通知他们都搬出去。

《牛津词典》

And while you're there, tell us if you have been able to quit smoking, and what advice you might have for others.

VOA: special.2010.05.31

So, if you're looking for another reason to quit, if you're looking for a reason not to start smoking, here's another good one.

因此，如果你正在寻找戒烟的另一个理由，如果你正在寻找一个不开始吸烟的理由，这就是很好的一个。

麻省理工公开课 - 化学原理课程节选

I don't agree that she has to quit her job.

我觉得你没必要炒掉她。

I agree课堂 - SpeakingMax英语口语达人

As your salary increases in the corporate world, it becomes more and more difficult to quit.

FORBES: Why You Should Quit Your Job

She announced her decision to quit United Russia in an expletive-rich radio interview earlier this month.

BBC: Russian ballerina says Kremlin banned her TV shows

He had to quit the cabinet last December after fast-tracking a visa for his ex-lover's nanny.

FORBES: Magazine Article