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单词 sima
释义

sima

/ˈsaɪmə/
noun
mass noun
Geology the material of the lower part of the earth's crust, underlying both the ocean and the continents, characterized as relatively heavy and rich in silica and magnesia
【地质】硅镁层, 硅镁带。比较SIAL.
词源
early 20th cent.: blend of SILICA+MAGNESIUM.
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更新时间:2025/1/9 5:07:18