蒋健棠英语实用句子(135):All our hard work was in vain 本文已影响 1.03W人 ing-bottom: 200%;">All our hard work was in vain.我们的努力都是白费的。in vain,徒劳的,白费的。He didn't die in vain.他没有白白地死去。I tried to persuade him but in vain.我尝试说服他,但没有用。