external field

• 外磁场

external field的用法和样例：

例句

1. Now consider applying an external magnetic field to the hydrogen atom.
   现在考虑加一外磁场于氢原子。
2. In other words, each domain is spontaneously magnetized to saturation even in the absence of any external field.
   换句话说，即使在没有任何外磁场的情况下，每个磁畴也自发地磁化到饱和。