在给定带宽条件下，将数据传输速度减慢一半，就能使每一个符号间隔的持续时间延长一倍。
Transmitting the data half as fast for given bandwidth will double the duration of each symbol interval.
开始一个异步操作，在指定时间间隔内向输出通道的目标传输消息。
Begins an asynchronous operation to transmit a message to the destination of the output channel within a specified interval of time.
开始一个异步操作，在指定时间间隔内向输出通道的目标传输消息。
Begins an asynchronous operation to transmit a message to the destination of the output channel within a specified interval of time.
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