a labour of Hercules

見 Hercules

a labour of love

a task done for pleasure, not reward

心甘情愿做的工作

labour the point

explain or discuss something at excessive or unnecessary length

不厭其煩地解釋（或討論）

labour under

carry (a very heavy load or object) with difficulty

費(fèi)力地搬（重物）

be deceived or misled by (a mistaken belief)

被（錯誤想法）蒙蔽（或誤導(dǎo)）

you've been labouring under a bit of a misapprehension.

你被一點(diǎn)點(diǎn)誤會蒙蔽了。