Even if you start with something (like a bump on a rotating neutron star) that gives off a perfect sine wave signal, it won't stay that way by the time it gets into the data stream.
Even if you start with something (like a bump on a rotating neutron star) that gives off a perfect sine wave signal, it won't stay that way by the time it gets into the data stream.
即使你开始时探测到一个完美的正弦波信号，等到记录它的时候可就是另外一个样子了。