constant的英语例句
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It's a constant struggle to try to keep them up to par.
要让他们达标,需要不断努力。
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Constant wheelchair use will scuff almost any floor surface.
任何地板上经常有轮椅走动几乎都会有所磨损。
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There was constant jeering and interruption from the floor.
议员席上不断有人在嘲讽和打岔.
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