a,an,one的区别

a,an,one的区别 one和an,a的区别, an,a与one的区别 a/an与one的区别：汉译英 a/an 或one天空的 a second one,another one ,the second one 的区别 a an the 的区别 不定冠词a/an和one有什么区别?求a/an的常见用法4种和特殊用法2种.最好要通俗易懂 简洁明了 a worse one; a better one; the worst one； the best one 的区别 keep one's eye on keep one's eyes on keep an eye on的区别 such one ,one such,such a 的区别 the better one 和a better one 的区别