单词：low-pass filter
low-pass filter的用法和样例：
例句
- Interference signals can be reduced by means of the input low pass filter.输入低通滤波器能减少干扰信号。
- A simple assembler routine fits a digital lowpass filter into a microcontroller.一个简单的汇编程序适合于微处理器实现数字低通滤波器。
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