graywacke
英式音标：graywacke怎么读
美式音标：graywacke怎么读
graywacke词义
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n. 杂砂岩；硬砂岩（等于greywacke）
graywacke英文词源
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- graywacke (n.)
- also greywacke, 1806, partial translation of German grauwacke; see gray (adj.) + wacke.