ionosphere

1. 1.

   The part of the Earth's atmosphere beginning at an altitude of about 50 kilometers (31 miles) and extending outward 500 kilometers (310 miles) or more.

   地球大气层的一部分,从约50公里(31英里)高度开始,向外延伸500公里(310英里)或更高。

2. 2.

   the outer region of the Earth's atmosphere; contains a high concentration of free electrons

   地球大气层的外层；含有高浓度的自由电子

3. 3.

   The similar region of the atmosphere of another planet.

   其他行星大气层的类似区域。

地球大气层的外层；含有高浓度的自由电子；其他行星大气层的类似区域。；电离层；[化] 电离层

Connections

Learner notes