Over time , this will take a heavy toll on teachers and students.

对于教师和学生, 这是无形的损耗.

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Taking care of his elderly mother take a heavy toll on his fiances.

照顾年老的母亲,对他的财力将造成重大的影响.

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Discounts take a heavy toll on rail, ferry operators.

折扣使得铁路运输行业和轮渡操作员的收入受到重创.

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