layer [ˈleɪə(r)]
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基本释义
adj.层,层次
英英释义
a level of material , such as a type of rock or gas , which is different from the material above or below it, or a thin sheet of a substance
参考例句
These seeds must be covered with a layer of earth. 这些种子必须盖上一层泥土。
The branches are weighed down by a heavy layer of snow. 树枝都被厚雪压弯了。
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