to pause before you do or say something, often because you are uncertain or nervous about it

She hesitated slightly before answering the detective's question. 在回答警探的问题之前，她稍稍犹豫了一下。

"Do you love me?" she asked. He hesitated and then said, "I'm not sure." “你爱我吗？”她问道。他犹豫了一下，然后说：“我不确定。”

[ + to infinitive ] If you need anything, don't hesitate to call me. 如果你需要什么，马上给我打电话。