拉技术是在手持设备使用其网关发出通信以请求数据时。
Pull technology is when the handheld device initiates the communication using its gateway to request data.
在手持设备上，用户可以展开通知来看到大的视图内容。
On a handheld device, users can see the big view content by expanding the notification.
当您点击此文件将不会有任何迹象显示在手持设备的事情发生了。
When you click on this file there will be no indication on the handheld that anything has taken place.
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