... penetration 贯穿，穿透 penetration frequency 穿透频率 penetration of current 电流穿透深度 ...
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critical penetration frequency 临界穿透频率
optimum penetration frequency 最佳穿透频率
frequency of penetration [物] 穿透频率
audio-frequency electrical penetration 音频电透视
audio frequency electric penetration 音频电透
low-frequency medicament penetration instrument 低频超声药物渗透治疗仪
As compared with CK (var. African E40) , the density of hairiness reduced the feeding time E2, and increased the 1st non-feeding time and penetration frequency.
与CK非洲E40相比，多毛可以显著降低棉蚜的取食周期E2，并可显著延长第1非取食周期和增加蚜虫口针的刺探频率。
As for the choice of the microwave irradiation frequency, the trade-off must be made in order to insure the penetration depth of the microwave signal, imaging contrast and signal-to-noise ratio.
为了同时兼顾穿透深度、成像对比度和信噪比三方面的需要，选择微波辐照频率时应该采取折中选取的原则。
By the analysis penetration of ZnOw into the compound board will compose a microscopic damping structure, which can reduce the vibration frequency and increase the damping ratio.
分析认为，氧化锌晶须渗入在复材中将形成微观的阻尼结构，起到降低固有振动频率和增大衰减率的作用。
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