| 1. | The present-day eccentricity of the orbit is small .
目前，轨道的偏心率不大。 |
| 2. | We have already worked out the conditions for a circular orbit .
我们已经算出了圆轨道的条件。 |
| 3. | To pin down the size of an orbital, we take a contour surface .
为束缚住轨道的大小，我们取一等值面。 |
| 4. | The shape of a real 2p orbital is two separated, distorted ellipsoids .
实2p轨道的形状是两个分开的变形的椭球。 |
| 5. | The concepts of penetrating and non-penetrating orbits must be modified .
必须修改贯穿式轨道和非贯穿式轨道的概念。 |
| 6. | Apollo 8 was a test in which an apollo moonship was put into orbit around the moon .
太阳神八号是将一艘登月艇纳入绕月球轨道的一项试验。 |
| 7. | The way electrons occupy the orbitals in an atom is called the electron configuration .
在一个原子中，电子占据轨道的方式称为该原子的电子构型。 |
| 8. | As he was pushing his bicycle across the tracks, he was surprised to hear his name called .
他正推着自行车，跨过轨道的当儿，忽听得有人叫他的名字。 |
| 9. | As a two-stage vehicle, the saturn i had full orbital capability for a variety of payloads .
作为一个两级飞行器的“土星”具有可将不同有效载荷送入轨道的能力。 |
| 10. | The tilt of the earth's axis, not the shape of its orbit, is what is responsible for the seasons .
形成季节的主要因素不是地球公转轨道的形状，而是地球自转轴的倾斜。 |
