Viewphone is a kind of video communication terminal that base on point to point, it makes use of current telephone network to transmit real-time bi-directional video and audio.

可视电话就是一种点到点的多媒体通信平台，它能实时双向传输通话双方的图像和语音信号。

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For example, people with conditions that vary over time, such as bi-polar disorder or dementia, can currently, in theory, be excluded from care because of the contradictory way regulations are written.

BBC: Extra investment 'needed to make care cap work'

It appeared during a time when there was a bi-polar system of world relations.

FORBES: Vladimir Putin's Realism on NATO and Afghanistan

Hand it to the publisher and editors at Forbes that they are moving Forbes.com from an on-line magazine to a bi-directional, real-time site for information and insight to the world of business and economic news.

FORBES: Changes in Journalism - Get Aboard, or Get Run Over!!