跃迁矩阵元被表示为两项，当入射电子和散射电子近似为平面波时，跃迁矩阵元的第一项是一个发散的复数；
The first term of this transition matrix element is a divergent pluralism when the incident and scattered waves are chosen as plane wave.
但当不可数名词前有表示数量的复数名词时，谓语动词用复数形式。
This is a collective noun. Though it appears in the singular form, it takes a plural predicate verb.
举个例子，如果你要表示自行车商店的复数形式，你是用“bicycles s shop”还是“bicycleshops”?在表示授权书的复数时，你是说“power ofattorneys”还是“powers of attorney”?。
For example, do you say bicycles shops or bicycle shops? Do you say power of attorneys or powers of attorney?
举个例子，如果你要表示自行车商店的复数形式，你是用“bicycles s shop”还是“bicycleshops”?在表示授权书的复数时，你是说“power ofattorneys”还是“powers of attorney”?。
For example, do you say bicycles shops or bicycle shops? Do you say power of attorneys or powers of attorney?
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