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词汇 带正电
例句 As air passes over the metal body, or flows through air inlets, it becomes positively charged.空气经过金属体或从进气口通过,就会带正电Atoms consist of positively-charged protons, negatively-charged electrons and neutral particles called neutrons.原子由带正电的质子、带负电的电子和称为中子的不带电粒子组成。
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