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| 不完整〔非完美〕晶体; 缺陷晶体 | |||
| 不完整晶体 | |||
| 真实晶体 | |||
| imperfect crystal: 6 phrases in 3 subjects |
| Metallurgy | 2 |
| Oil / petroleum | 2 |
| Technology | 2 |
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