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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
"You seem very upset."
"No, no, it's nothing - I'm OK."
“你看上去很不安。”
“不，不，没什么，我很好。”
"It was so nice of you to look after the baby all day."
"Oh, it was nothing, I enjoyed it."
“谢谢你一整天照顾宝宝。”
“哦，没什么，愿意效劳。”