The band structure reveals the form of the impurity levels due to the substitutional impurity in semiconductors. 掺杂模型的能带结构显示，由于在半导体母体中进行杂质原子取代而形成了杂质能级。
In these low-dimensional structures, besides coulombic interactions, the impurity levels are affected by confining potentials and the dimension of the structures. 在这些低维半导体结构中，除了库仑相互作用外，杂质能级还受限制势和结构尺度的影响。
Magnesium-hydroxide powder features high purity, well distributed particle size, extremely low in impurity. 氢氧化镁纯度高，颗粒均匀，重金属等杂质含量低，可在多个领域广泛应用。
If a material previously considered to be pure can be resolved into more than one component, that material can be redefined into new terms of purity and impurity. 如果之前被认为是纯净的物料可以被分解成不只一个组分，那么那个物料可重新定义为纯度和杂质的新术语。
