it is/was nothing used to tell someone not to worry about, or place special value on, what you are doing or have done 别担心;没什么要紧的 A：You seem very upset. 你看上去很不安。 B：No, no, it's nothing - I'm OK. 不，不，没什么，我很好。 A：It was so nice of you to look after the baby all day. 谢谢你一整天照顾宝宝。 B：Oh, it was nothing, I enjoyed it. 哦，没什么，愿意效劳。