1) 数一数二 = 名列前茅 = outstanding
2)不三不四 = 不正派,也指不象样子 = shady,dubious,unsavory
或 = 不伦不类 = neither fish not foul (英语成语)
3) 五颜六色 = 各色各样 = colorful,rich and varied,diverse
4)七上八下 = 零落不齐 = in a confused state,at sixes and sevens (英语成语)
或 = 慌乱不安,无所适从 = butterflies in the stomach (英语成语)
上面是按本人对这些成语的理解翻的,
可能还有其他理解.