Due to the frequencypulling of FLL, the passband of the filter in PLL can be made very narrow to suppress the noise, and the PLL can lock carrier's phase with high accuracy.
With the click of a few keys, I can send each of them a message, pulling them into my life in Numbers and with a frequency that was unthinkable twenty years ago.
点击几个键，我可以给每人发送消息，从数量上把他们拉进我的生活，这种频率在二十年前是不可想象的。
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The pulling frequecncy needs to be high to ensure high data accuracy, but high pullingfrequency may induce redundant checks leading to high network traffic.