您要查找的是不是：
- Leverage mechanism for preventing labor in vain. 使用杠杆式夹具操作，可以达到省力的作用。
- Unless the LORD builds the house, those who build it labor in vain. 若不是耶和华建造房屋，建造的人就枉然劳力；
- Have I believed and labored in vain for my Master? 我所相信和为主努力的一切是否只是徒劳？
- To learn without thinking is labor in vain, to think without learning is desolation. 学而不思则罔,思而不学则怠。
- Unless the Lord builds the house, its builders labor in vain. Unless the Lord watches over the city, the watchmen stand guard in vain. 若不是耶和华建造房屋,建造的人就枉然劳力;若不是耶和华看守城池,看守的人就枉然警醒。
- Unless the LORD builds the house, They labor in vain who build it; Unless the LORD guards the city, The watchman keeps awake in vain. （所罗门上行之诗）若不是耶和华建造房屋，建造的人就枉然劳力。若不是耶和华看守城池，看守的人就枉然警醒。
- I sought to persuade him, but in vain. 我试图说服他，但无效。
- I tried to make his peace with her, but in vain. 我试图使他与她和好，但还是白搭。
- There is a clear division of labor in ants. 蚂蚁间有明确的分工。
- I tried to console her, but in vain. 我试着去安慰她，但是无效。
- All our entreaties were in vain. 我们的乞求全是枉然。
- I have seen it in the faces of those women who know that they're not laboring in vain. 我从那些知道自己所做之事并非徒劳的女性脸上看到了这一点；
- They endeavoured to make her happy but in vain. 他们尽量使她快乐，却徒劳无功。
- We tried in vain to make him change his mind. 我们想使他改变主意，结果是白费心机。
- Hullo! Who's that, taking my name in vain? 喂！是谁在那儿议论我？
- All his father's exhortations were in vain. 他父亲的一切劝告都无效。
- Php 2:16 Holding forth the word of life; that I may rejoice in the day of Christ, that I have not run in vain, neither labored in vain. 腓2:16将生命的道表明出来，叫我在基督的日子好夸我没有空跑，也没有徒劳。
- This, clearly, was one of those stubborn proletarians for the alleviation of whose false consciousness Marx had labored in vain. 这位（大英博物馆的老头），显然，是马克思徒劳地想减轻其虚假意识的冥顽不化的无产阶级之一。
- He tried in vain to catch the butterfly on the flower. 他白费力气想抓住停在花上的蝴蝶。
- Day after day she waited in vain for him to telephone her. 日复一日，她徒劳地等待他的电话。
