knock on wood片语KK [nɑk ɑn wʊd] /nɑk ɑn wʊd/发音片语1老天保佑、但愿如此、希望别出事口语,多为美式The car has never broken down on me, knock on wood.这辆车从没在我手上坏过,老天保佑。2敲木头字面义She knocked on wood after saying she had never been sick.她说自己从没生过病,说完就敲了敲木头。用这个字练口说→