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| 31. | chain like veins |
| 锁键状矿脉 |
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| 32. | streak inoculation |
| 划线接种 |
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| 33. | streak retinoscope |
| 条纹检影镜 |
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| 34. | he has a stubborn streak; a streak of wildness. |
| 稳定性是气质的一个特点。 |
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| 35. | A regularly shaped and lengthy occurrence of an ore;a lode. |
| 矿脉某种矿石的形状规则而且漫长的出现；矿脉 |
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| 36. | payaBle vein of ore |
| 可获利的矿脉 |
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| 37. | A level of rock-bearing ore; a vein. |
| 矿脉；含矿岩层 |
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| 38. | There are streaks of ore in the mountains. |
| 这山里有矿脉。 |
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| 39. | strike a rich vein of ore |
| 发现丰富的矿脉. |
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| 40. | It's blue streak. |
| 做得非常利落。 |
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