这个消息，eBay正在推出一个新的绿色购物站和广告活动。

That is the message eBay is pushing with a new green shopping site and AD campaign.

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例如，假定有一个应用程序在每次向在线购物车添加了物品后都会发送一条消息。

For example, consider an application that sends a message each time an item is added to an online shopping cart.

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购物车中的物品可能需要一起处理，或许要将其聚合到单个订单消息中。

The items in the shopping cart may need to be processed together, perhaps to aggregate them into a single order message.

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