单词：drop of frequency
drop of frequency的用法和样例：
例句
- The existence of components decreases the shielding effectiveness and resonant frequency.元件的存在使得机箱的屏蔽效能降低，谐振频率下降。
- A new method based on the frequency decrease rate for fast identification of site liquefaction from surface acceleration records was presented.摘要提出了一个以频率下降率为基本指标的依据强震记录快速识别场地液化的新方法。
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