The International Telecommunications Union estimates that 4.6 billion mobile phones are in use at the moment.

国际电信联盟估计现在全球在使用中的手机有46亿部。

youdao

The International Telecommunications Union estimates that 4.6 billion mobile phones are in use at the moment.

国际电信联盟估计现在全球在使用中的手机有46亿部。

youdao