Web 浏览器和其他客户机使用这些元数据决定如何处理该文件，比如判定本身能否显示它还是要传递给帮助器程序。
Web browsers and other clients use this metadata to decide how to process the file -- for example, to determine whether they can display it natively or have to pass it to a helper application.
应用程序服务器作出基本内容判定，并且在不等待客户机请求的情况下将数据推到手持设备。
The application server makes basic content decisions and pushes data to the handheld device without waiting for the client s request.
一位阿根廷的广告业人士使用隐蔽摄影机以及充当诱饵的廉价自行车，着手判定布宜诺斯艾利斯不同地区的犯罪情况。
Using hidden cameras and cheap bicycles as bait, an Argentine publicist set out to gauge crime in different neighbourhoods of Buenos Aires.
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