knuckle under

基本解释

He refused to knuckle under to the enemy.
他拒绝向敌人投降。
Even if times get tough, they don't knuckle under.
即使面临困难的时候，他们也不屈服。
Meanwhile, our most recent intake, the little dog, still refuses to knuckle under, conducting itself in a manner that runs counter to all stated regulations.
同时，我们最新招收的那位，一只小狗，仍然拒绝服从，他的行为方式就是违反一切已宣布的规矩。

It depends upon whether they decide to knuckle under to a recent court ruling or whether they want to continue to ignore the fines they owe.
FORBES: Could Apple Be Closed Down in Italy?
In this set of negotiations much is being made of the fact that should Google not knuckle under then the Commission has the ability to fine Google up to 10% of global turnover.
FORBES: Why The EU Is Negotiating With Google, Not Suing It