基本解释乳臭未干同根派生 be wet behind the ears相关词英汉例句双语例句He used to be wet behind the ears, but after five years he's quite experienced.他过去毫无经验，但五年之后他已经很熟练了。be wet behind the ears更多例句英英字典剑桥英英字典to be young and without experiencebe wet behind the ears剑桥字典be wet behind the ears柯林斯字典