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| 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 | |||
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ionosphere : 27 phrases in 5 subjects |
| Communications | 2 |
| Electronics | 11 |
| Information technology | 1 |
| Life sciences | 10 |
| Natural sciences | 3 |