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She keeps house industriously and frugally and niggles over every detail of each bill.
她勤俭持家对每张账单的每一项目都仔细核查.
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Professor Smith works industriously at ninety-two natural elements in his laboratory every day.
史密斯教授每天在实验室里孜孜不倦地研究92种天然元素.
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