...A电源适配器2.1输入电压 12V10A电源适配器2.2输入频率 额定频率（Nominal Frequency）:50/60Hz 调整频率（Variation Frequency）:47-63Hz 12V10A电源适配器2.3输入电流 当输入交流电压为额定值的下限时,输出电压负载满载，最大输入交流电流2A。
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Variation Frequency Range 频率范围
variation-frequency method 变频法
frequency variation 频率变动 ; 频率偏移 ; [电子] 频率变化 ; 频率飘移
variation-frequency induced polarization method 变频激电法
frequency variation rate 频率变化速率
high-frequency instantaneous variation 高频瞬变
The variation frequency of regenerated plants increased with the time of culture.7.
再生植株变异频率也在长期继代培养过程中随着培养时间的延长而逐渐增大。
参考来源 - 棉花体细胞培养及体细胞无性系变异初探·2,447,543篇论文数据，部分数据来源于NoteExpress
Still, the mathematical models used to rank results are usually some variation of the common term-frequency/inversed document frequency model, which is well-mapped territory.
尽管如此，用于排序结果的数学模型通常是常用的 词频/倒排文档频率模型的变体，而对于这种模型，已有很好的研究基础。
Electrical characteristics may vary depending on changes in temperature and frequency. Please consider this variation when you design circuits.
设计线路板时应考虑到电容器的电性能可能随温度和频率的变化而变化。
Orthogonal Multi-Carrier Modulation(OMCM) is adopted to overcome the frequency selectivity and time variation of low-voltage power line channel.
为克服低压电力线信道的频率选择性和时变性，系统采用正交多载波方式传输信息。
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