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| 31. | A circular band of colored light around a light source, as around the sun or moon, caused by the refraction |
| 晕环绕着诸如太阳或月亮等发光体的一圈有色光晕，通常是由于散布在大气层中的冰物质使光线发生反射或折射而引起的 |
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| 32. | He realized that the force that pulls apples to the ground could also be what keeps the moon orbiting |
| 他意识到是引力使苹果落到地上，也正是引力使月亮可以围着地球转。 |
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| 33. | repeatedly measuring the distance between them, scientists can calculate the orbits of the Earth and the moon |
| 通过反复测量他们之间的距离，科学家们可以计算出地球和月球相对彼此，围绕太阳公转的轨道。 |
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| 34. | The electrons circle around the nucleus just as the moon travels around the earth. |
| 电子围原子核转就象月亮围绕地球转一样。 |
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| 35. | In this sample, the goal is to create the illusion of a spherical moon rotating around its vertical axis |
| 在本例中，目标是创建球状的月亮在它竖直轴附近转动的幻觉影像。 |
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| 36. | or sixth-graders, good students or good-offs—we were free just to be ourselves, to build forts, to moon |
| 没有学校来告诉我们我们是甚麽－－五年级，六年级，好学生还是坏学生－－我们可以轻松的做自己，去建造（自己的）城堡，带著满脑子的幻想的计划想飞到月亮上去。 |
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| 37. | The moon revolves around the earth in such a manner that it always faces the latter with the same side |
| 月球围绕地球运动的方式是这样的，即它始终以同一面朝着地球。 |
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| 38. | Earth's shadow is expected to blot out the moon beginning around 7 p.m. on the West Coast and 10 p.m. |
| 周三的这次月全食将持续降临一小时。地球的阴影将在西海岸晚上7点，东海岸晚上10点开始遮蔽月球。西海岸的观天者将错过月食的开始，因为那时月亮还未升起。 |
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