A4

劍橋詞典

in the UK, paper that is a standard size of 21 centimetres by 29.7 centimetres
（英國(guó)標(biāo)準(zhǔn)的）A4紙（21 x 29.7厘米）
a sheet of A4 一張A4紙
A4 paper A4紙 返回 A4