| 1. | Rather, we infer that planetary systems must be quite common .
相反，我们的结论是行星系统的存在一定相当普遍。 |
| 2. | Planetary perturbations make the earth's orbit about the sun irregular .
行星的摄动使得地球绕太阳的轨道是不规则的。 |
| 3. | These bands must introduce longitudinal asymmetry in the planetary albedo .
这些云带必定引起行星反照率的经向不对称性。 |
| 4. | It is reasonable to suppose that other stars are also attended by planetary system .
有理由猜测别的恒星也伴有行星系统。 |
| 5. | New discoveries about uranus excited planetary astronomers in 1977 .
一九七七年对天王星的几项新发现振奋了行星天文学家。 |
| 6. | The sciences of planetary geology have benefited tremendously from these new finds .
行星地质科学从这些新发现中受益匪浅。 |
| 7. | Many objections can be raised to this picture of planetary nebula formation .
形成行星状星云的这一图像可能会引起许多异议。 |
| 8. | During the early stages of planetary evolution they served to sweep the solar system .
在行星演化的早期，他们用来清扫太阳系。 |
| 9. | Travel to the planetary systems of other stars is a much more formidable undertaking .
要航行到其他恒星的行星系中去是件极难实现的事。 |
| 10. | Very accurate predictions of planetary orbits require corrections to the central-field approximation .
想要非常准确地预言行星的轨道，就需要对中心场近似进行修正。 |
