| 单词 | Van Allen belts |
| 释义 | Van Allen belts, Van Allen radiation belts /van alˈən (rā-di-āˈshən) belts/plural nounEither of two rings of intense particle radiation surrounding the earth at a distance of above 1200 miles (1930km) from it ORIGIN: JA Van Allen (1914–2006), American physicist |
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