in vain片语KK [ɪn ven] /ɪn veɪn/发音片语1徒劳、白费、没有结果We searched in vain for the missing keys all morning.我们找了一上午遗失的钥匙,却徒劳无功。2白白、枉然Their sacrifice was not in vain, because the reform finally passed.他们的牺牲并非白费,因为改革最终通过了。3不敬地、亵慢地多用于宗教语境He was taught never to take the Lord's name in vain.他从小被教导不可妄称主的名。用这个字练口说→