1·Gallium arsenide, silicon, and germanium are all examples of semiconductors, the type of material used in virtually all modern electronics.
镓砷化物，硅，和锗元素都属于半导体，而如今半导体在所有的现代电子元件中都会用到。
2·Moreover, gallium arsenide is much more expensive than silicon in the first place.
另外，最重要的是，镓砷化物比硅贵得多。
3·The material is a semiconductor called gallium manganese arsenide.
这种材料是一种叫做镓锰砷化物的东东。
4·The sediment has stronger adsorption to the arsenide and there is a clear linear relationship between arsenic content apd relevant sediment content.
另外，还发现泥沙对砷化物有较强的吸附作用，含砷量与相应含沙量之间呈明显线性关系。