-an的用法和样例：
词汇搭配
- make an appearance 出现(出面
- an open book 尽人皆知的事物...
- at an end 结束
- raise an eyebrow 扬起眉毛; 感到惊讶...
- an eye for an eye 以眼还眼
- an enemy worthy of someone's steel 值得某人与之交锋的强...
- come to an end 结束
- draw an inference 由 ... 而推断出...
- in an instant 立刻
- have the digestion of an ostrich 消化力强
- an iron fist in a velvet glove 外宽内严,外柔内刚...
- as like as an apple to an oyster 毫无相同之处...
- turn an honest penny 用正当手段挣一点钱(...
- cast an eye at 看一看(查看一下)...
- put to an issue 使对问题便于做出决定...
- lay an egg 下蛋(完全失败)...
- not bat an eye 没有合眼,泰然不动...
- a Roland for an Oliver 势均力敌
- be born under an unlucky star 生在不幸中
- make an ass of oneself 做蠢事
