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| 1. | Diamond is the hardest natural substance on earth. |
| 钻石是地球上最坚硬的天然物质。 |
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| 2. | natural earth potential |
| 自然地电势 |
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| 3. | natural earth current |
| 自然地电流 |
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| 4. | Starch is one of the most abundant natural polymers in the earth. |
| 淀粉是地球上储量最丰富的天然高分子聚合物。 |
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| 5. | natural earth surface |
| 天然土路面 |
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| 6. | A natural brown earth containing ferric oxide and manganese oxides, used as pigment. |
| 棕土含有红色氧化铁和氧化锰的天然棕色泥土，用作颜料 |
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| 7. | Artificially applied currents were dispensed with entirely and natural earth currents used instead there |
| 在那里完全不用人工施加电流而用地球内部的天然电流来代替。 |
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| 8. | A disk, globe, or crescent resembling the natural satellite of Earth. |
| 月状物,新月状物类似地球自然卫星的碟、球体或新月状物 |
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| 9. | of the color of any of various natural brown earth pigments. |
| 指各种各样的像土地一样的自然的褐色。 |
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| 10. | heaven falling and the earth cracking; natural disasters like giant earthquakes and landslides |
| 天崩地裂 |
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