addition
/əˈdɪʃən/noun
mass noun
1
- the action or process of adding something to something else增加：
the hotel has been extended with the addition of more rooms.
旅馆增加了更多的房间, 扩大了。
1.1
- count noun a person or thing added or joined, typically in order to improve something添置的人手; 添加物：
you will find the coat a useful addition to your wardrobe.
你会发现你衣橱里添加这件外套是很有用的。
2
- the process or skill of calculating the total of two or more numbers or amounts加法, 加：
she began with simple arithmetic, addition and then subtraction.
她从简单的算术学起, 先是加法再是减法。
2.1
- Mathematics the process of combining matrices, vectors, or other quantities under specific rules to obtain their sum or resultant【数】加法。
短语
in addition
- as an extra person, thing, or circumstance另外, 加之：
members of the board were paid a small allowance in addition to their normal salary.
董事会成员除了正常薪水之外, 还有少量津贴。
词源
late Middle English: from Latin additio（n-）, from the verb addere （see ADD）.