单元HSK 5dānyuánn. 房屋、教材等自成一组的单位 (often used to refer to a house or a textbook) unit, separate part, system or group of a whole Connected through: 元
单调HSK 6dāndiàoadj. 简单、重复而没有变化 tediously repetitious, lacking in variety, monotonous Connected through: 调
订单HSK 6dìngdānorder_form, order, order form, order form for goods, purchase order, indent Connected through: 订
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