短語詞組短語Polarity Molecules 極性分子polarity test [電]極性試驗(yàn);極性測試;極性試驗(yàn)polarity finder 極性測定器output polarity 輸出端極性;輸出極性;輸出端信號極性polarity switch 極性開關(guān);極性轉(zhuǎn)換開關(guān)Polarity Protection 極性保護(hù);極性防護(hù)polarity subchron 極性亞時(shí);[地物]極性亞代polarity detector 信號極生探測器polarity period 極性紀(jì)reverse polarity [電子]反極性；逆偏振opposite polarity 相反極性polarity reversal 反極性；極性變換；極性倒轉(zhuǎn)negative polarity 負(fù)極性polarity effect 極性效應(yīng)；極化效應(yīng)reversed polarity 反極性 返回 polarity