a breath of fresh air
一股清风
A: He has a girlfriend already.
A: 他已经有女朋友了。
B: You're kidding!He just broke up with Ann.
B：别开玩笑了，他刚和安分手。
A: His new girlfriend is a far cry from Ann.She's like a breath of fresh air.
A：他的新女友和安大不相同，她像一股清风，令人心神一爽。
B: I hope l will meet her soon.
B:我希望能很快见到她。