地球的

• The sea is very big. it covers three quarters of the globe .
  海洋很大，地球的四分之三是海洋。
• The earth's atmosphere is an invisible gaseous envelope .
  地球的大气是一个看不见的气体包围圈。
• A spherically symmetric structure of the earth has been assumed .
  人们把地球的构造假设为球状对称。
• The atomic cloud was still drifting across the skies of the planet。
  原子云层还在地球的天空上漂浮着。
• 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 hydrosphere and the lithosphere together form the earth's surface .
  水圈与岩石圈一起形成地球的表面。
• Celestial poles are situated directly over the earth's geographical poles .
  天极直接位于地球的地理极上面。
• The sun disturbs the elliptical motion of the moon around the earth .
  月球绕地球的椭圆运动受到太阳的干扰。
• In the earth's interior there are similar channels or low-velocity layers .
  在地球的内部有相似的通道或低速层。
• Eros is one of the planetoids which passes near the earth every now and then .
  爱神星是一个时常靠近地球的小行星。