[英语高手翻译准确的。]给你参考下，希望对你有用呵呵。Tinding the Mother（小蝌蚪找妈妈）The little tadpoles saw some ducks were playing with their mother.They remembered their mother.（小蝌蚪...+阅读
楼上的都基本正确，还不太完美呵
我认为是：
大多数场内期权交易所中使用美式期权。
（这样调换了主语是为了符合汉语习惯，不过如果原上下文是排比句式或比较的语气的话，也可以直接照字面翻译为“美式期权在大多数场内期权交易所中被使用”）
核心点：
American options： 美式期权。指可以在一定行使期权内的任意一天内行使的期权。与只能在固定行使日期行使的欧式期权（European options）相对应。显而易见，在其他条件相同的情况下，美式期权的权利金（即购买这个期权的价格）要比欧式期权高一些。
organized options exchanges： 场内的期权交易所。exchange这里是名词，表示交易场所，一般专用于描述股票、期权、外汇等的交易场所。比如最有名的纽约证券交易所NYSE: new york stock exchange ；比如芝加哥期权交易所CBOE: Chicago Board Option Exchange。organized exchange 指场内交易所，与场外交易市场（over-the-counter market）相对应。
延伸阅读：
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