level of high frequency component 高频分量电平
high frequency base-level cycle 高频基准面旋回
high frequency sea-level change 高频海平面变化
high-frequency sea-level fluctuation 高频海平面变化
low-level high frequency signal 低电平高频信号
For certain signal types, such as low level or high frequency, the analog backplane should not be used to avoid possible signal degradation.
对于特定的信号类型，例如低电平或高频率，则不宜使用模拟背板，以避免造成信号劣化。
It has high level of stability and can produce waveform of high frequency and precision.
它能产生频率高、精度高、稳定性好的波形。
Results show that EFL learners, even at the advanced proficiency level, have great difficulty with high frequency function words, such as TO and FOR.
结果显示，中国英语学习者，即使在高级阶段，在运用如TO和FOR等高频率功能词方面仍然有很大的困难。
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