1、You may toil at your job, but this is where your real work is.
你也許勤于你的職務(wù)，但這是你真正的工作。

2、What do people gain from all the toil at which they toil under the sun?
人一切的勞碌，就是他在日光之下的勞碌，有甚么益處呢？

3、Young men toil at the millstones; boys stagger under loads of wood.
少年人扛磨石，孩童背木柴，都絆跌了。

toil at翻譯