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41. | origin of earthquake |
| 地震成因 |
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42. | photocoordinate origin |
| 相片坐标原点 |
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43. | epizootic origin |
| 列疫起源 |
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44. | origin of petroleum |
| 石油成因 |
|
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45. | magmatic origin |
| 岩浆成因 |
|
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46. | origin period |
| 基期(会计学) |
|
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47. | nonrotating origin |
| 无旋转原点 |
|
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48. | origin of man |
| 人类起源 |
|
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49. | incendiary origin |
| 放火原因 |
|
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50. | their national origin. |
| 他们的民族起源 |
|
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