渤澥桑田 [ㄅㄛˊ ㄒㄧㄝˋ ㄙㄤ ㄊㄧㄢˊ; bo2 xie4 sang1 tian2] lit. blue seas where once was mulberry fields (idiom, from 史記[ㄕˇ ㄐㄧˋ; shi3 ji4], Record of the Grand Historian); time brings great changes life's vicissitudes ◄ ►