老师不得不阻止孩子们在课堂上大声喧哗。

The teacher had to ___hold back the children from making loud noises in class.

他本想说些什么，但还是忍住了。

He wanted to say something but chose to ___hold back.

老师没有隐瞒任何信息，把所有细节都告诉了我们。

The teacher didn't ___hold back any information and told us all the details.