positive polarityˈpɔzitivpəʊˈlærɪti:短语¹⁰⁶¹⁰⁰⁺⁵ 基本例句 正极性 DIS has its own drawbacks by having half of the plugs firing with an acceptable negative voltage, while the other half is fired by the less acceptable positive polarity. DIS有自身的缺点，由于有一半的插头接通一个可接受的负电压，而另一半接通不太能接受的正极。 blog.sina.com.cn