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单词
sima
释义
si·ma
AHD
[sīʹmə]
D.J.
[ˈsaɪmə]
K.K.
[ˈsaɪmə]
n.
(名词)
The lower layer of the earth's outer crust that underlies the sial and is rich in silica, iron, and magnesium.
硅镁层:地球外壳的较低层,在硅铅层之下,富含硅、铁和镁
Etymology
语源
si(lica)
si(lica)
ma(gnesium)
ma(gnesium)
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更新时间:2026/4/28 21:17:19