但该服务存在一个问题，由于需要使用货币汇率(如yahoo的货币转换器网站发布的汇率)进行初始化，因此启动需要很长时间。

But one problem with the service is that it takes a long time to start up because it needs to be initialized with currency-exchange rates, like those published on Yahoo's currency converter Web site.

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