They kept on working after dark.
天黑了他们还继续工作。
Though it was late they kept on working.
尽管天色已晚，他们还在继续工作。
Though it was late, they kept on working.
尽管已经很晚了，他们还在继续工作。
They kept on working in the field after dark.
他们在天黑后还在地里劳动。
They kept on working in the fields in spite of the rain.
尽管下雨，他们还是继续在田间干活。
They kept on working in the fields in spite of the rain.
尽管下雨，他们还是继续在田间干活。
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