短語(yǔ)詞組短語(yǔ)infrequence infrequency 很少發(fā)生polarization infrequency 雙圓極化cut -infrequency 接通轉(zhuǎn)速potential field technique infrequency domain 位場(chǎng)頻域技術(shù) 返回 infrequency