这些电子数据大部分通过卫星传送，其中多数卫星是不受保护的商业系统。

Much of this electronic data is transmitted by satellites, most of them unprotected commercial systems.

youdao

这些电子数据大部分通过卫星传送，其中多数卫星是不受保护的商业系统。

Much of this electronic data is transmitted by satellites, most of them unprotected commercial systems.

youdao