自从1980年以来他一直坚持学习。
约翰自从参加工作以来，一直坚持学习英语。
John has kept up his study of English ever since he began to work.
过去一年学习中，我一直坚持着，几乎没有间断。
With the children in the nurseries, they can keep on without interruption.
尽管平时的学习很忙，但我一直坚持练习书法。
Although I am very busy everyday, I still keep on practice calligraphy.
尽管平时的学习很忙，但我一直坚持练习书法。
Although I am very busy everyday, I still keep on practice calligraphy.
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