| 单词 | asthenosphere |
| 释义 | asthenosphere /as then"euh sfear'/, n. Geol. the region below the lithosphere, variously estimated as being from fifty to several hundred miles (eighty-five to several hundred kilometers) thick, in which the rock is less rigid than that above and below but rigid enough to transmit transverse seismic waves. [1910-15; < Gk asthen(és) frail (see ASTHENIA) + -O- + -SPHERE] |
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