| 单词 | radio meteor |
| 释义 | radio meteor [`rād·ē·ō `mēd·ē·ǝr] ASTRONOMY A meteor which has been detected by the reflection of a radio signal from the meteor trail of relatively high ion density (ion column); such an ion column is left behind a meteoroid when it reaches the region of the upper atmosphere between about 50 and 75 miles (80 and 120 kilometers), although occasionally radio meteors are detected at higher altitudes. |
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