音标发音英式音标 [əˈdɪʃ.ən ˌsaɪn]美式音标 [əˈdɪʃ.ən ˌsaɪn]英式发音 美式发音 基本解释加号(+)。同根派生 addition sign相关词英英字典剑桥英英字典 the symbol + , used between two numbers to show that they should be added togetheraddition sign剑桥字典addition sign柯林斯字典