势族

另一部分则在“清议”、“清谈”、玄虚的文化中，伴随势族的发展，演化为魏晋“清简”型官吏。

Another part , in " idletalk " & the culture of mystery , accompany the development oftendency clan , evolution into " clear and simple " type official .

分析了交-交变频器输出电压、电流和时间谐波磁势的谐波族特征，指出了该特征对电动机运行噪声的影响。

The characteristics of harmonic cluster of output voltage , output current and time harmonic magnetic potential of AC-AC frequency converter is analyzed .

负电子亲和势Ⅲ－Ⅴ族化合物半导体光电阴极及其发展

Development of Negative Electron Affinity ⅲ - ⅴ Compound Semiconductor Photocathodes

透射式负电子亲和势Ⅲ-Ⅴ族化合物光阴极工作波段的设计问题

Problems in designing the wavelength range of the transmission NEA III V compound photocathodes