n.加，增加，附加；[数]加法；增加的人或事物； 变形： 复数：additions 双语释义：n.(名词)[U]加; 加法 adding, especially calculating the total of two or more numbers[C]增加的人〔事物〕 person or thing added or joined英英释义： addition[ ə'diʃən ]n.a component that is added to something to improve it"the add