ionosphere
UK/ai'ɒnә.sfiә/US
TOEFLC2
Definitions
n.
The upper layer of the atmosphere containing charged particles that reflect radio waves
电离层（高层大气中含有带电粒子、能反射无线电波的一层）
Root Breakdown
Root-derivediono- (from ion, a charged particle) + -sphere (layer) = the 'ion layer' high in the atmosphere. Its charged particles bounce radio waves back to Earth, which is why long-distance AM radio works at night.
Root sphere still carries 11 more wordsCommon Collocations
- 1.Earth's ionosphere地球电离层
- 2.ionosphere layer电离层
Example Sentences
- 1.
Radio signals bounce off the ionosphere to reach distant cities.
- 2.
Solar storms can disturb the ionosphere and disrupt communications.