frequency compound的用法和样例：
例句
- Digital look-up table method for synthesizing periodic signals is the most popular technique for direct digital frequency synthesis.
数字查表法合成周期信号是一种最常用的直接数字频率合成技术。 - A new advanced method to constitute a multiple point frequency synthesizer by using large scale PLL frequency IC controlled by single chipmicrocomputer is presented.
用单片机控制大规模集成锁相环频率合成电路来构成多频点频率合成器，使大规模集成锁相环频率合成电路的功能得到充分发挥。
