与其他国家大多的做法不同，电视信号通过地面和卫星传送，比直接向个人的手机上发送数据流的方法效率高得多。
The signals are delivered via terrestrial and satellite broadcasts, a far more efficient approach than sending individual data streams to each viewer's handset, as is mostly done in other countries.
对于树中的每个节点，都定义了一个超级链接，如果用户单击该链接，就会向Discovery发送应用一个元数据条件的信号。
For each node in the tree, define a hyperlink that, if clicked on by the user, signals to the Discovery to apply a metadata condition.
发送事件信号唤醒申请集以便它可以向CCD表填充新数据。
Issue an event signal to wake up the subscription set so it can populate the CCD table with new data.
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