1.The mass was calculated by timing the orbit of Eris' moon Dysnomia.

1.通过对厄斯卫--戴丝诺米娅运行道计时后计算出了厄斯质量。

2.A plane orbited over the landing field.

2.有一架飞机在机场上空盘旋。

3.The earth orbits the sun once every 365.25 days.

3.地球每365.25天绕太阳道一圈。

4.They put a weather satellite into orbit round the earth.

4.他们把一颗气象卫送入环绕地球道。

5.Mars, Venus and the other planets move in eccentric orbits.

5.火、金及其他行沿不正道运行。

6.Let's pretend we're on the spaceship orbiting round the earth!

6.让我们假装是在沿道绕地球运转宇宙飞船上!

7.Our satellite itself will orbit around the moon for a period of two days.

7.我们人造卫本身将绕月球运行两天时间。

8.The orbit of the artificial satellite has an apogee of 200 miles from the earth.

8.这个人造卫道，其最远点在离地球200英地方。

9.Mercury orbits the Sun.

9.水环绕太阳运行。

10.The first satellites placed in geostationary orbit were the synchronous communication(SYNCOM)satellites launched by NASA in 1963.

10.第一个放置在对地静止道卫是1963年美国航空暨太空总署发射同步传输卫.

11.Also, as our sun orbits the galactic center it may sweep through areas of interstellar dustiness.

11.同样，因为太阳位于重力中心，它可能会清除有际尘埃区域。

12.It orbits an inhospitable ice world named Orto Plutonia, which was a protectorate of the Pantorans.

12.它围绕一颗不适宜居住冰冻球奥托普卢托尼亚旋转，奥托普卢托尼亚是潘托拉人保护地。

13.The repeated thrust applications at apoapsis would raise periapsis from inside to outside the stationary orbit.

13.重复在远心点施以推力，会将近心点由同步道内提升到同步道外。

14.Apollo 8 was a test in which an Apollo moonship was put into orbit around the moon.

14.太阳神八号是将一艘登月艇纳入绕月球道一项试验。

15.John Glenn, the first American to orbit the earth, carried pureed applesauce in squeezable tubes on his initial space flight.

15.3．约翰?格伦，第一位绕地环行美国宇航员，在他首次飞行时带有软管包装苹果酱。

16.The shape and perigee of artificial satellite orbits shall continually variate due to caused by the atmospherical drag and the earth gravity.

16.人造地球卫道由于大气阻力和地球引力场等因素摄动,其形状和近地点位置将不断改变。

17.Abstract.The first orbit maneuver of lunar orbit insertion (LOI) must be implemented at the first perilune of the spacecraft flight to the moon.

17.月球捕获控制第一次制动必须在卫飞向月球第一近月点完成。

18.After completing lunar swingby maneuvers, the A spacecraft is intended to orbit the Sun "Ahead" of planet Earth, and the B spacecraft "Behind".

18.在完成对探测器变后，A飞船将在地球前方绕行太阳，而B飞船则在"后方"绕行。

19.Galileo was forced to recant his assertion that the earth orbited the sun.

19.伽利略被迫放弃地球围绕太阳转断言。

20.Dire Pithi Wrecker, Plunderer as well as Dire Guristas Wrecker and Plunderer were having orbit range problems for guns and missile. This has been fixed.

20.修正了灾难波希肇事者、灾难波希豪夺者、可怕古斯塔肇事者导弹环绕距离错误。