名词
中文翻译：Unknown
同义词：
['increment', 'addition']
例句：
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3. 例句：1. The company added a new department to its staff last week.
上周公司增加了一个新部门到其员工中。
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2. The teacher added a few extra lessons to the curriculum this semester.
这学期老师在课程中增加了几个额外的课时。
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3. The cost of the new product is an addition to the existing costs.
新产品的成本是现有成本的一个增加。