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1·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。《柯林斯英汉双解大词典》

2·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。

3·Let's not forget that eclipses in planetary motions had important symbolic meanings.

我们不要忘记，在行星运动中，日食有重要的象征意义。

4·The Moon's spin and tilt are unique among other planetary bodies in the solar system.

月球的自转和倾斜在太阳系的其他行星体中是独一无二的。

5·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。

6·They never altered their incorrect mental models of planetary motion because their everyday observations didn't support what their teachers told them.

他们从来没有改变他们关于行星运动的错误的心智模型，因为他们每天的观察所得并不证实他们的老师所教授的内容。

7·According to Alan Stern, planetary scientist, the biggest public relations boost for the ISS may come from the privately funded space flight industry.

行星科学家艾伦·斯特恩认为，国际空间站最大的公关推动力可能来自私人资助的太空飞行业。

8·But they never altered their incorrect mental models of planetary motion because their every day observations didn't support what their teachers told them.

但是他们从来没有改变他们关于行星运动的错误的心智模型，因为他们每天的观察所得并不支持他们的老师所教授的内容。

9·You know planetary researchers love studying deep craters to learn about the impacts that created them, and how they redistributed pieces of the planet's crust.

我们知道，行星研究人员喜欢研究深深的陨石坑，以了解造成这些陨石坑的撞击，以及它们是如何重新分配行星的地壳物质的。

10·Since most planetary scientists believe that water is essential to life, the presence of jarosite means that one prerequisite for life was once present on Mars.

由于大多数行星科学家认为水是生命的基本要素，因此黄钾铁矾的存在意味着火星上曾经存在出现生命的先决条件之一。

行星的

1·Let's not forget that eclipses in planetary motions had important symbolic meanings.

我们不要忘记，在行星运动中，日食有重要的象征意义。

2·The Moon's spin and tilt are unique among other planetary bodies in the solar system.

月球的自转和倾斜在太阳系的其他行星体中是独一无二的。

3·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。

4·According to Alan Stern, planetary scientist, the biggest public relations boost for the ISS may come from the privately funded space flight industry.

行星科学家艾伦·斯特恩认为，国际空间站最大的公关推动力可能来自私人资助的太空飞行业。

5·They never altered their incorrect mental models of planetary motion because their everyday observations didn't support what their teachers told them.

他们从来没有改变他们关于行星运动的错误的心智模型，因为他们每天的观察所得并不证实他们的老师所教授的内容。

行星式

1·A variation from this type is planetary internal grinding, which is recommended for heavy workpieces that cannot be held in chucks.

这种方法的一个变体是行星式内表面磨削，当工件较重不能用卡盘固定时推荐使用。

2·The theory and solution of the lever analogy are systematically given, and the method is generalized to become a common one of dynamic analysis for planetary transmission.

系统地给出了杠杆模拟法的理论和应用方法，并将该方法推广成为行星式变速器动力学分析的通用方法。

3·The lever analogy used in analyzing planetary transmission has been perfected and further developed in this paper.

本文对用于行星式变速器分析的杠杆模拟法进行完善和拓展。

4·In order to obtain the kinetic model of wet grinding powdered whiting in the planetary ball mill, the process of wet superfine grinding of powdered whiting was studied by the BS model.

为了获得行星式球磨机中重钙的湿法超细粉碎动力学模型，用BS模型研究了重钙的湿法超细粉碎过程。

5·The planetary mill can be used for the ultrafine comminution, when the mechanism size of the mill is determined, the escaping position of the critical speed of the grinding ball will not be changed.

行星式球磨机可以用于超细磨矿。磨机的结构尺寸一旦确定，磨球脱离筒壁的临界转速脱离点位置则不会改变。

(1)planetary gear行星齿轮

(1)planetary gear transmission行星齿轮传动

(1)planetary transmission行星齿轮变速箱

(1)planetary motion行星运动

(1)planetary gear train行星轮系

(1)planetary nebula行星状星云