一个一件英语

a piece ofa bottle of a bowl of

均以“一”单位为例：一个 a(n)一件 a piece of一盒 a box of 一只 a(n)仅供参考。

一个直接用a/an ，就可以表示了，比如an apple，就是一个苹果的意思，a dress,就是一件衣服一瓶可以说a bottle of ... 比如a bottle of orange juice 一瓶桔汁

一件用英语是a piece of。解释：a piece of 英[ə pi:s ɔv] 美[e pis ʌv] [词典] 一块; 一片; 一张; 一件; [例句]I picked up a piece of wood and started carving.我拿起一件木头，开始雕刻起来。She has replenished a piece of coat recently.她最近添置了一件皮袄。Strain the juice through a piece of gauze or a sieve. 用一件纱布或过滤网将果汁过滤一下。A piece of long thin wool coat and a purple headscarf protected her against the wind.一件薄薄的羊毛长外套和一条紫色的头巾为她挡了风。

可数就直接用a或an不可数就用a piece of