音標(biāo)發(fā)音英式音標(biāo) [?e??f??r]美式音標(biāo) [?e??f??r]英式發(fā)音 美式發(fā)音 基本解釋（英國(guó)標(biāo)準(zhǔn)的）A4紙（21 x 29.7厘米）。同根派生 A4相關(guān)詞英漢例句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劍橋字典A4柯林斯字典