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但是在引信信号侦察接收中，频率的精确测量是很困难的。
But it's difficult to measure the frequency accurately in the signal's scout and reception.
FPGA器件的出现，为实现宽带雷达信号侦察数字接收机提供了硬件支持。
However, the invention of FPGA device makes it convenient to realize such a wideband radar signal reconnaissance digital receiver.
张认为这种信号侦察是一种抑菌机制：我们细胞监测CSF作为检测和应付肠道菌群重要变化的方法。
Chang thinks of this signal detection as a kind of "bacteriostat" mechanism: our cells are monitoring CSF as a way of detecting and adapting to important changes in the gut flora.
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