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The United States is responsible for the most space debris in space, followed by Russia and China.
太空中的空间碎片主要来源美国，其次是俄罗斯和中国。
There are more than 4,600 satellites orbiting Earth, along with more than 14,000 old rocket parts and other pieces of space junk.
太空中有4600多个卫星围绕地球运转，此外还有14000多个废弃的火箭部件和其他太空垃圾碎片。
Experts are starting to worry that with so much junk being left behind collisions in space will increase and it could become too dangerous to leave Earth.
专家担心它们碰撞后在太空所留下的垃圾将不断增加，从而给地球安全带来危险。
The orbital garbage moves at a speed roughly 10 times faster than a bullet and can stay in orbit for hundreds of years.
轨道垃圾运行速度是子弹的十倍，并且能够在轨道中存留上百年。
译文属可可英语原创，未经允许，不得转载。
