通过手机进行视频通话是一种新型服务，在去年配有前置摄像头的多款智能手机上市后才开始逐渐成熟。

Making video calls over mobile phones is a nascent practice, one that began to get serious only last year, when multiple smart phones with front-facing cameras came to market.

youdao

通过手机进行视频通话是一种新型服务，在去年配有前置摄像头的多款智能手机上市后才开始逐渐成熟。

Making video calls over mobile phones is a nascent practice, one that began to get serious only last year, when multiple smart phones with front-facing cameras came to market.

youdao