| 单词 | troposphere |
| 释义 | Word Frequency troposphere(ˈtrɒpəˌsfɪə) noun the lowest atmospheric layer, about 18 kilometres (11 miles) thick at the equator to about 6 km (4 miles) at the Poles, in which air temperature decreases normally with height at about 6.5°C per km Derived forms tropospheric (ˌtrɒpəˈsfɛrɪk) adjective |
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