| 1. | When a train of waves travels from left to right, the particles revolve clockwise in these paths .
一列波从左向右通过液体时，质点在这些路径上沿顺时针方向绕转。 |
| 2. | A wave occurs when many or all the ellipses rotate at the same rate
当许多或所有的椭圆以相同速率绕转时，便产生了一个波。 |
| 3. | The movement can be classified as along an exact circle with a constant speed
绕转之前移动方向为自北向南，沿圆周的切线运动。 |
| 4. | Besides , the movement and rotation of the two stars are caused by a huge gravitational force
另外，两星的移动和绕转是由巨大的引力拉动的。 |
| 5. | The returning distance is the same as the reaching distance and the time spent is also the same
绕转之后移动方向为自南向北，也是沿圆周的切线运动。 |
| 6. | The accumulated mass scatters stars and prevents them from orbiting regularly , as a bar requires
累积的质量造成恒星分散，不让它们规律地绕转，而这是维系棒状结构的必要条件。 |
| 7. | In that time , the orbit gets offset by 105 degrees ; thus , the sun ' s ellipse does a full rotation once every 790 million years
在这段时间里，轨道偏移105度，使太阳的椭圆每7亿9000万年才能完整绕转一次。 |
| 8. | Roughly a sixth are “ hot jupiters ” surprisingly near their stars , all closer than mercury is to our sun
其中大概有1 / 6属于热木星型的行星，它们非常接近所绕转的恒星，其轨道半径也都小于水星到太阳的距离。 |
| 9. | The diameter of the locus circle is about one fifth of that of the moon and it took the two stars about one second to go around the half circle
绕转时两星在同一条旋扫直径的两端，各转了180度，画出的两段弧几乎组成正圆。 |
| 10. | Using the formula of the universal gravitation and the centrifugal force , we can calculate that the centrifugal force required for rotation is 3 . 4 billion billion billion times of the universal gravity
利用万有引力和向心力的公式，我们可以计算出，绕转所需的向心力为万有引力的3400亿亿亿倍。 |
