two-way channel

Premiere, a subscription channel which began in 1991, shows live football covering the top two divisions.

开播于1991年的付费电视频道premiere实况转播两大顶级足球联赛的赛事。

Compared with the other two kinds of digital TV broadcasting modes ( satellite and cable), digital TV terrestrial broadcasting faces a much more complicated channel, many kinds of interferences exist.

与其他两种数字电视传输方式（卫星与有线）相比，数字电视地面广播中信道条件非常复杂，存在各种干扰。

Premiere, a subscription channel which began in 1991, shows live football covering the top two divisions

开播于1991年的付费电视频道premiere实况转播两大顶级足球联赛的赛事。

Premiere, a subscription channel which began in 1991, shows live football covering the top two divisions...

开播于 1991 年的付费电视频道 premiere 实况转播两大顶级足球联赛的赛事。

Base on the quantum theory, QKD can make enables two participants to share secure keys over an insecure public channel in real time.

量子密钥分配以量子理论为基础，可以在不安全的公共信道上安全地实时分配密钥。