| 单词 | 却是徒劳 |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔in vain〕He tried in vain to get the baby to sleep.他努力想哄宝宝入睡，却是徒劳一场。韦氏高阶〔jack〕The man tries hard to jack the car,but to no avail.那个男人努力想把汽车顶起来，但他的努力却是徒劳的。21世纪英汉〔seek〕We sought in vain for a solution.我们想找个解决办法，却是徒劳无功。牛津搭配〔vainly〕He shouted after them, vainly trying to attract their attention.他在他们的后面高喊，想引起他们的注意，却是徒劳。牛津高阶〔vainly〕Volunteers vainly searched for clues.志愿者们到处搜寻线索，却是徒劳。韦氏高阶 |
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