Everyday isn't going to be smooth sailing and there will be times when you want to throw in the towel.

每一天并不会一帆风顺的过去，也会有想要放弃的时候。

youdao

Sometimes a business that is up against it will have to throw in the towel. This means to accept defeat or surrender.

有时一门生意四面受困将不得不throw in the towel，意思是认输或放弃。

youdao

A strong woman will cry, but will not throw in the towel.

坚强的女人会哭，但是不会认输。

youdao

Analysts have begun to wonder which firm will throw in the towel first, perhaps to quit the business.

ECONOMIST: They just don��t get IT | The

Will the bullish Fisher stick to his story that stocks are a good buy, or will he throw in the towel?

FORBES: Time For A Change

The only other possible argument is that missile defense will have no effect whatsoever (highly unlikely) or that it will make the Iranians just throw in the towel (also highly unlikely).

FORBES: A Debate Over Ballistic Missile Defense: Iran is a Rational Actor, and the Huge Unintended Consequences of ABM