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41. | sidereal variation |
| 恒星变化 |
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42. | individual variation |
| 个体变异 |
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43. | without variation |
| 没有差异 |
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44. | cyclical variation |
| 周期性变动 |
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45. | bounded variation |
| 有界变差 |
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46. | month variation |
| 月变异差 |
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47. | impressed variation |
| 强制变异 |
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48. | rhythmic variation |
| 节律变化 |
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49. | Hesser's variation |
| 海塞尔变化 |
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50. | daily variation |
| 每日变动 |
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