This lets you check that the execution of the service doesn't affect the value of some external fields.

这使您可以检查服务的执行有没有影响一些外部字段的值。

youdao

Semiclassical closed orbit theory has been extensively used to explain the photo-absorption spectra of atoms in external fields due to its clear physical picture and wide availability.

半经典闭合轨道理论由于具有物理图像清晰、可近乎解析处理等特点被普遍用来解释原子或离子在强外场中的光吸收现象，成为实现联结经典理论和量子世界的重要桥梁。

youdao

But when the external fields are very strong, the trajectory of an electron begins to bifurcate, thus chaos appears.

但是，当电场和磁场很强时，电子的运动轨道开始分岔，运动出现混沌。

youdao

Most materials, including milk and water, are diamagnetic, which means they are repelled by external magnetic fields though this phenomenon is far too subtle to be observed in normal circumstances.

ECONOMIST: Monitor