| 单词 | troposphere |
| 释义 | troposphere —tropospheric /trop'euh sfer"ik, -sfear"-, troh'peuh-/, adj. /trop"euh sfear', troh"peuh-/, n. Meteorol. the lowest layer of the atmosphere, 6 mi. (10 km) high in some areas and as much as 12 mi. (20 km) high in others, within which there is a steady drop in temperature with increasing altitude and within which nearly all cloud formations occur and weather conditions manifest themselves. [1905-10; TROPO- + SPHERE] |
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