The web service takes two country names as input and returns the conversion rate between the currencies.

该Web服务采用两个国家名称作为输入参数，将返回两种货币之间的兑换比率。

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For example: the guests came to web site through which websites and advertising, how long the average stay within the site, browse a web page of the guest's conversion rate is how much, and so on.

例如：客人是通过哪些网站和广告来到网站的，在网站内的平均停留多长时间，浏览某一网页的客人的转化率是多少，等等。

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Conversion rate can be measured by the number of forms filled out on your Web site, the number of downloads or views, etc.

转换率可以通过填写您网站上的表格人数，下载和浏览次数等等来衡量。

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