n. 1.附加，追加；附加物。 2.【数学】加法，加算。 3.【法律】(加在姓名后的)头衔，官衔；称号。 4.(建筑物的)附加部分。 短语和例子 have an addition (to one's family) 生孩子，添人口。 in addition 加之，又，另外。 in addition to 加之，除…外又。
the act of adding one thing to another; "the addition of flowers created a pleasing effect"; "the addition of a leap day every four years"
the arithmetic operation of summing; calculating the sum of two or more numbers; "the summation of four and three gives seven"; "four plus three equals seven" 同义词：summation, plus,
a component that is added to something to improve it; "the addition of a bathroom was a major improvement"; "the addition of cinnamon improved the flavor" 同义词：add-on, improver,
a suburban area laid out in streets and lots for a future residential area
something added to what you already have; "the librarian shelved the new accessions"; "he was a new addition to the staff" 同义词：accession,
a quantity that is added; "there was an addition to property taxes this year"; "they recorded the cattle''s gain in weight over a period of weeks" 同义词：increase, gain,
Addition is a mathematical operation that represents combining collections of objects together into a larger collection. It is signified by the plus sign (+).
例句与用法
1.
Such polymers are termed addition polymers . 这类聚合物称为加聚物。
2.
The 1938 addition had negligible damage . 1938年的扩建部分只有极轻微的破坏。
3.
This can be improved by the addition of an adjuvant . 这可以从增效剂上加以改进。
4.
It is called carry-save addition . 它被称为无进位加法。
5.
The most obvious change is the addition of "spikes" . 最明显的变化是“刺”的附加。
6.
Addition of the shortstop causes the emulsion to break . 中止液的加入引起乳液破坏。
7.
A standing opaque beacon may be useful in addition . 此外，也可以使用常设的实体觇标。
8.
It is a newly built addition to the school this year . 这是今年新完成的本校增建部分。
9.
Storage at 4℃ requires addition of an antimicrobial agent. 在4保存则须加进防腐剂。
10.
Potentials may be summed by the law of algebraic addition . 势可用代数和的定律来相加。
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