The little boy is very interested in planetary science.

这个小男孩对行星学很感兴趣。

New planetary systems are being discovered almost every month.

几乎每个月都有新的行星系被发现。

Planetary air pollution gained global attention.

地球大气污染引起了全球关注。

Within our own galaxy there are tens of thousands of planetary systems.

在我们的星系中 有数以万计的行星系统

Within our own galaxy there are probably tens of thousands of planetary systems.

在我们所在的银河系中，很可能存在数以万计的行星系。

The next day, Venus—planetary ruler of Libra—turns retrograde.

第二天，天秤座的行星统治者金星开始逆行了。

China's first planetary probe, the tiny Yinghuo-1 orbiter, will also hitch a ride to Mars with Phobos-Grunt.

中国的第一个行星探测器，小小的“萤火一号”轨道飞行器，也将搭乘“福布斯-格朗特”号飞船前往火星。

It's not going to Jupiter. It's going to some other planetary system.

它不是去木星，而是去其他的星系。

This paper derives the motion property equation for Ravigneaux planetary transmission.

本文推导了拉维娜式行星齿轮变速器的运动特性方程。