How video calling started视频通话是如何开始的

游余

Video calling is a technology1 when you call somebody. You see him at thesame time. It is a normal2 thing for us today. But people do not know it onehundred years ago.

People first get the idea of video calling in the late 1890s. They do not knowhow to do it. The first success3 is in the 1930s. But the video is very bad. A UScompany makes a Television-Phone in 1955. People see each other when they call.The screen4 is 25 cm wide. The Internet changes video calling in the late 1990s. Itis fast and the picture is good.

Many people use video calling every day. They work from home or they must stayat home. They are happy that they can see their family and friends on the screen.

视频通话是一种和人通话的技术。你在跟他通话时能同时看到他。这对我们今天来说是一件很寻常的事。但一百年前人们还不知道它。

人们在19 世纪90 年代末首次有了视频通话的想法。他们不知道怎么把它做出来。第一次成功是在20 世紀30 年代，但视频效果很糟糕。1955 年，一家美国公司生产出一种电视电话。人们打电话时看得到对方。电视电话的屏幕宽25 厘米。20 世纪90 年代末，互联网改变了视频通话，连接速度很快，画面也很清晰。

许多人每天都使用视频通话。他们在家工作，或者必须待在家里。他们很高兴能在屏幕上看到自己的家人和朋友。

Notes

1. technology 科技；技术

2. normal 正常的；标准的

3. success 成功；胜利

4. screen  屏幕