toil

He doesn't spend every minute toiling away at his desk.

他并非每分钟都在伏案辛苦地工作。

With the advent of the five-year-plans, millions of women also began to toil in factories and in heavy construction, building dams, roads and steel mills in summer heat and winter frost.

随着“五年计划”的到来，数以百万计的妇女也开始在工厂和大型建筑工地、大坝、道路和钢铁厂中苦干，经受着夏天的酷热和冬天的严寒。

They toiled up the hill in the blazing sun.

他们冒着炎炎烈日艰难地一步一步爬上山冈。

He led a life of hardship and toil.

他过着艰难劳苦的生活。

There is nothing to guarantee that everybody is willing to make the effort; there is no assurance that the learner will have any adequate return for his toil.

没有什么可以保证每个人都愿意付出努力；学生的辛苦学习是否能得到适当的回报，这是没有把握的。