| Expression | 下等金刚石结晶很差的金刚石，用于工业切割和研磨 |
|---|---|
| Meaning | Poorly crystallized diamonds used for industrial cutting and abrasion. |
| Reading | xià děng jīn gāng shí jié jīng hěn cī de jīn gāng shí， yòng yú gōng yè qiè gē huò yán mó |
Tags: hsk4-limited4-part4
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