In the presence of impurities or in a nonstoichiometric solid, free electrons or electron holes are produced as a result of “charge compensation” to neutralize the effect of charged ionic defects 。
在杂质存在的情况下,或在非化学计量比的固体中,为了中和带电离子缺陷所引起的电荷不平衡,

生自
电子或电子空穴。
,
和芽胞粘连在一起。
普通美国人都普遍认为,



购物,特别是永远


