天壤之別 [ㄊㄧㄢ ㄖㄤˇ ㄓ ㄅㄧㄝˊ; tian1 rang3 zhi1 bie2] lit. night and day difference (idiom) as different as sky and earth opposite extremes a world of difference (between them) a far cry from ◄ ►
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