This works by the client invoking the subscribe operation on the Grid service, telling it which data it is interested in and the location of the client's notification receiver.

这是通过客户机调用Grid服务上的订阅操作实现的，告知grid服务它对哪项数据感兴趣以及客户机的通知接收者的位置。

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The critical fields are Location, Summary, Start date, End Date and Alarm notification.

Event 中的关键字段是 Location、Summary、Start date、End Date 和 Alarm notification。

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The product is not unlike the popular Foursquare location-based service, and lets you “check-in” at a place and send a notification to your friends who are nearby.

这个产品和现在流行的Foursquare地理定位服务不同，它可以让你在某个地点“签到”，然后会给你这个位置附近的好友发送消息。

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