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- earth rs axis 地轴
- Most of the earth rs surface is covered by water. 大部分的地球表面被水覆盖着。
- Earth quakes can result from stresses in the earth rs crust. 地壳内的应力可能引起地震。
- The sun appears to rise and set because of the earth rs rotation. 因为地球在自转，看上去就有了日出和日落。
- Lunar eclipse occurs when the earth rs shadow falls on the moon. 地球的影子落在月球上时，就发生月蚀。
- Children supporting their parents is nature rs law and earth rs way. 子女奉养父母是天经地义的。
- Does the earth rotate on an axis? 地球是绕轴旋转的吗？
- The earth's axis is the line between the North and South Poles. 地轴是南北极之间的线。
- earth rs line of maximum atmospheric gradient 地球最大大气梯度线
- The earth's axis is titled at an angle of about 231. 地轴倾斜成约二百三十一度角。
- The earth turns (ie rotates) on its axis once every 24 hours. 地球每24小时自转一圈。
- the loose mass of the earth rs crust 一层松散物质
- earth rs gravitational field model 地球重力场模型
- reentry into the earth rs atmosphere 重入地球大气层
- Our pilotless rocket enters the track of the earth. 我们把一个无人驾驶的火箭送入了地球的轨道里。
- The earth rotates on its axis once every24 hours. 地球每24小时依其轴心自转一次。
- The earth spins round the sun, and on its own axis. 地球围绕太阳旋转，并以地轴作自转。
- The attraction of the moon for the earth causes the tides. 月球对地球的吸引力造成潮汐。
- The earth turns on its own axis. 地球绕地轴自转。
- The earth is only a speck in the universe. 地球在宇宙中只不过是一个小点罢了。
