be hard on 对……苛刻，要求严格，不客气

　　Don't be so hard on yourself, you already did great.

　　别太为难自己，你已经干得不错。

　　Don't be too hard on him, he is just a little boy.

　　别对他太苛刻了，他还是个孩子。

　　疯狂练习吧！