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ionosphere [aɪ'ɒnəsfɪə, aɪ'ɑːnəsfɪr] n
gen.	电离层〔圈〕
adv.	调幅波反射的电离层
agric.	电离层 (ionosphera)
avia.	电离圈
hydroel.st.	电离层
met.	电离离子层
radio.amat.	电离层
tech.	游离层; 离子层
ionosphere A region of the earth's atmosphere, extending from about 60 to 1000 kilometers above the earth's surface, in which there is a high concentration of free electrons formed as a result of ionizing radiation entering the atmosphere from space [aɪ'ɒnəsfɪə, aɪ'ɑːnəsfɪr] adj.
environ.	电离层 (地球的大气层区域，位于地球表面以上大约60至1000公里，其中有由于从太空进入大气的的电离辐射而形成的高浓度自由电子。)

ionosphere : 61 phrases in 14 subjects

Air defense	4
Antennas and waveguides	1
Aviation	8
Communications	1
Earth sciences	9
Electronics	4
General	1
Geophysics	1
Information technology	1
Nautical	1
Space	20
Technology	7
Telecommunications	2
United States	1