| 1. | Venus has the distinction of spinning "backward" on its axis .
金星具有沿主轴反向自转的特性。 |
| 2. | A person who lives at the equator is in accelerated motion due to the earth's rotation .
一个居住在赤道的人由于地球自转的缘故是作着加速运动的。 |
| 3. | A few decades ago it was discovered that the rotational velocity of the earth undergoes small variations .
几十年前，人们发现地球自转的速度有微小的变化。 |
| 4. | The period during which a celestial body makes a similar rotation
天体自转一周的时间天体做类似自转的一段时间 |
| 5. | The reason : bringing the calendar back into synchronization with the earth ' s rotation requires the addition of an extra second
原因是：为了让历法配合上地球自转的脚步，我们得多加一秒钟。 |
| 6. | The rotation of the original gas and dust cloud becomes the revolutions of the planets around the sun and the rotation of the sun itself
气体尘埃云原先的转动，成了行星公转和太阳自转的原动力。整个过程大约用了 |
| 7. | That is , it moves above the equator at the same rate as the earth s rotation so that all the time it is above the same geographical area on the earth
它环绕地球的速度与地球自转的速度相同，固它在任何时刻均逗留在地球上同一地点的上空。 |
| 8. | That is , it moves above the equator at the same rate as the earth s rotation so that all the time it is above the same geographical area on the earth
它环绕地球的速度与地球自转的速度相同，固它在任何时刻均逗留在地球上同一地点的上空。 |
| 9. | Astronomers , historians and others are upset about the prospect of losing the leap second and have initiated a spirited debate to keep time tied to the earth ' s rotation
天文学家、历史学家及其它许多学者，皆对于往后即将废除润秒感到苦恼，并且对于时间配合地球自转的议题，展开热烈的讨论。 |
| 10. | One reason is the change of interior convection zone with spectral type produce the phenomena ; another reason is the differential rotation of f type stars exist a upper limit
这一拐点的出现可能是f型主序星的对流区的变化影响形成的，也可能是f型主序星在f5附近存在较差自转的上限形成的。 |
