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| 41. | Mars, Venus and the other planets move in eccentric orbits. |
| 火星、金星及其他行星沿不正圆的轨道运行。 |
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| 42. | Mars and Earth have orbits which change with time. |
| 火星和地球有随时间而改变的运行轨道。 |
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| 43. | Each planet traces an orbit around the sun as if no other planets were present. |
| 每一个行星绕着太阳作轨道运行，就像不存在其它行星那样。 |
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| 44. | the five major planets each have their own orbit, but all revolve around the sun. |
| 五星各有各的运行轨道, 但都绕着太阳公转。 |
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| 45. | The moon does not describe a circle round the earth, but rather an ellipse |
| 月球绕地球运行的轨道不是浑圆的，而是椭圆的。 |
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| 46. | This paper presents the characteristics associated with long-distance rail transit line and the analysis of train operation routing solution and vehicle selection. |
| 介绍了长大轨道交通线特点,对长大轨道交通线运行交路方案及车辆选择作了分析。 |
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| 47. | The intersection plane of the earth's orbit with the celestial sphere, along which the sun appears to move as viewed from the earth. |
| 黄道地球运行轨道与天球的交界面，在地球上看，太阳似乎沿着黄道运行 |
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| 48. | More than60% of the stars in the Milky Way have a companion star around which they orbit. |
| 银河中超过六成的恒星在其运行轨道附近存在伴星。 |
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| 49. | The mirrors could orbit -- thousands of miles high -- at the same speed as the earth turns on its axis. |
| 反射镜可在数千英里的高空以地球绕地轴运行的同样速度做轨道运行。 |
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| -- 来源 -- 中级百科部分 - P_baikeduwu_kejiqita |
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| 50. | We must leave ..the ship is falling out of orbit. |
| 我们必须离开..这艘飞船正在脱离它的运行轨道. |
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