Labour

例句：

1. 1. The farmer has been working hard all morning.
   农民一直在努力工作。
2. 2. The construction workers are putting in long hours of labour.
   建筑工人正在辛勤工作。
3. 3. The scientist is spending his spare time on labouring over a research project.
   这位科学家正在利用他的空闲时间研究一个项目。