音标发音英式音标 [ˌeɪˈfɔːr]美式音标 [ˌeɪˈfɔːr]英式发音 美式发音 基本解释(英國標準的)A4紙(21 x 29.7厘米)。同根派生 A4相关词英汉例句noun [ U ]a sheet of A4 一張A4紙A4 paper A4紙A4更多例句英英字典劍橋英英字典 in the UK, paper that is a standard size of 21 centimetres by 29.7 centimetresA4剑桥字典A4柯林斯字典