| 单词 | 电离层 |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔D layer〕The lowest layer of the ionosphere, existing only during the day.D层：电离层的最底层，只有日间存在美国传统〔REFLECT〕When atmospheric conditions are right, radio waves bounce off the ionosphere and can be received many thousands of miles away. 在适当的大气条件下，无线电波从电离层反弹回来，在数千英里之外都可以接收得到。朗文写作活用〔thermosphere〕The outermost shell of the atmosphere, between the mesosphere and outer space, where temperatures increase steadily with altitude.热大气层，热电离层：大气层介于中间层和外层空间之间的最外一层，在这一层中温度随高度而稳定增加美国传统 |
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