I pretended to be amused by his laboured joke.

我假装被他勉强的笑话逗笑了。

She trembled as she walked with laboured breath.

她呼吸吃力，走起路来颤颤巍巍。

After laboured effort, we achieved our goal ahead of schedule.

经过艰苦的努力，我们提前完成了目标。

We laboured all day in the fields.

我们在田地里辛勤劳动了一整天。

The horses laboured up the steep slope.

那些马费力地爬上了陡坡。

They laboured for years to clear their son's name.

他们为洗刷儿子的罪名奋力斗争了许多年。

Scientists laboured for months to unravel the mysteries of Neptune and still remain baffled.

科学家们为揭开海王星之谜艰难地工作了数月，但依然迷惑不解。

The night came on, chilly and overcast; and still the footsore monarch laboured slowly on.

夜来了，又冷又阴沉；脚痛的国王仍旧慢慢地勉强往前走。