Mobile phones are now spreading fast, even in the poorest parts of the world.

即便是世界上最贫穷的地区，手机也在迅速普及。

Devices were grouped by generation — desktop computers, basic mobile phones, and box-set TVs.

设备按年代分组——台式电脑、基本移动电话和1992年定义的盒式电视机。

Please make sure all mobile phones are switched off during the performance.

请确保演出时关上所有手机。

At secondary school, most youngsters have mobile phones.

在中学，大多数年轻人都有手机。

The professor warned the students that on no account should they use mobile phones in his class.

教授警告学生们绝对不要在课堂上玩手机。