开发了两种设计方案：数字式和模拟式。

There are two design methods: analog mode and digital mode.

youdao

第一代模拟和第二代数字系统支持语音通信和有限的数据通信能力。

The 1st and 2nd generation wireless telecommunication system provide voice traffic and limited data traffic.

youdao

第一代模拟和第二代数字系统支持语音通信和有限的数据通信能力。

The 1st and 2nd generation wireless telecommunication system provide voice traffic and limited data traffic.

youdao