A privately owned us communications spacecraft collided with a defunct Russian satellite about 800 km above northern Siberia.

美国一家私营公司的通信卫星与俄罗斯的一颗报废卫星在距西伯利亚北部地区800公里的高空相撞。

youdao

From Jiangyin Yangtze River Bridge, 10 km north-south communications, transportation is very convenient.

距江阴长江大桥10公里，沟通南北，交通十分便利。

youdao

The 250 million km between Mars and Earth right now means there is a 13-minute lag in communications.

BBC: Nasa's Curiosity Mars rover set for high risk landing