该函数首先解锁所有信号并设置会话密钥环。
This function begins by unblocking all signals and setting the session key ring.
卡西尼号远离土星环而观察到的每个信号的变化提供了一份环材料分布的侧写。 这是一个距土星距离的函数，或是一个光学深度剖面。
The observed changeof each signal as Cassini moved behind the rings provided a profile ofthe distribution of ring material as a function of distance fromSaturn, or an optical depth profile.
这个函数的操作取决于底层硬件，但是通常sk _ buff所描述的报文都会被移动到硬件环或队列中。
The operation of this function is dependent upon the underlying hardware, but commonly the packet described by the sk_buff is moved to a hardware ring or queue.
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