不 ㄅㄨ ˋ bù 啻 ㄔ ˋ chì 天 ㄊㄧㄢ tiān 渊 ㄩㄢ yuān 不 ㄅㄨ ˋ bù 啻 ㄔ ˋ chì 天 ㄊㄧㄢ tiān 淵 ㄩㄢ yuān no less than from heaven to the abyss (idiom); differing widely worlds apart the gap couldn't be bigger