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- Studies of the gravity field of the Earth indicate that its crust and mantle yield when unusual weight is placed on them. 对地球引力的研究表明，在不寻常的负荷之下地壳和地幔会发生位移。
- Studies of the gravity field of the Earth indicate that its crust and mantle yield when unusual weght is placed on them. 对地球的地心引力领域的研究表明，当异常重量的东西放在地球上，那么地壳和地幔就会移动。
- Gravity prospecting involves the measurement of variations in the gravitational field of the earth. 重力勘探意味着测量地球重力场的变化。
- 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 magnetic field of the earth creates a torque around the pivot. 地球的磁场在支点周围产生一个转矩。
- The attraction of the moon for the earth causes the tides. 月球对地球的吸引力造成潮汐。
- Studies of the gravity field of the Earth indicate that, 对地球引力的研究表明
- What percentage of the earth is covered by oceans? 地球上百分之多少被海水覆盖着？
- The heated air drinks up the moisture of the earth. 热空气把土里的湿气都吸干了。
- What is it like in the bowels of the earth? 地球内部是什么样子？
- Nitrogen forms most of the Earth's air. 地球上空气的大部分成分是氮气。
- The bird-song is the echo of the morning light back from the earth. 鸟的歌声是曙光从大地反响过去的回声。
- The first blades of grass speared out of the earth. 第一批青草的叶片破土而出。
- Geologists have calculated the age of the earth. 地质学家已经计算出了地球的年龄。
- When describing the magnetic field of the earth we must specify both the direction and the intensity of the field. 当描述地球磁场的时候，我们必须强调磁场的方向和强度。
- 'H( z" P0 d4 h. y40. Studies of the gravity field of the Earth indicate that its crust and mantle yield when unusual weight is placed on them. 对地球引力的研究表明，在不寻常的负荷之下地壳和地幔会发生位移。
- Nitrogen forms about 78% of the earth's atmosphere. 氮约占地球大气的百分之七十八。
- The aerosphere and magnetic field of the earth can protect humans from ultraviolet radiation and X-rays. 大气层和地球磁场能保护人类免受紫外线和x光辐射。
- There is a field of corn in front of the village. 村前有一块玉米田。
- These are energies coming from the sun and magnified by the force field of the moon, then re-illuminated to the Earth. 来自太阳的能量，由月亮的磁力场扩大，然后再将光照射到地球上。
