By contrast, an external system serves as an interface between a company and its customer base.

相比之下，外部系统是公司与其客户群之间的接口。

youdao

External tables provide a normal table interface to data files that reside in the underlying operating system.

外部表对驻留在底层操作系统中的数据文件提供一个普通的表界面。

youdao

Three external systems are considered: the wiper interface, the windshield, and the car electrical system.

需考虑三种外部系统：雨刷器接口，挡风玻璃，和汽车电子系统。

youdao

"The brain-machine interface is a system that allows disabled people, people suffering from physical disabilities to communicate with external world and also to control devices."

VOA: special.2011.04.04