The second issue is circumvented by sending a "keep-alive" or "sync" message at constant intervals to fool the browser into thinking that data is coming at a slower rate.

第二个问题可通过“保持活动”或按固定间隔“同步”消息来欺瞒浏览器，使浏览器认为数据是以较慢的速率传入的。

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The spreading signal is a pseudo-noise code sequence that has a chip rate which is orders of magnitudes grater than the data rate of the message.

扩频信号是一个伪随机代码序列，此码片速率比消息数据速率高若干数量级。

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