Wordiyoionosphere
🇬🇧 UK/ai'ɒnә.sfiә/🇺🇸 US
TOEFLC2
Definitions
n.
The layer of Earth's upper atmosphere, from about 50 to 500 km altitude, containing high concentrations of free electrons that reflect radio waves
电离层
🧩 Root Breakdown
Root-derivedExample Sentences
- 1.
Radio waves are reflected by the ionosphere, allowing long-distance communication.