geoid ['dʒi:ɔɪd]

例句:

• For cartographical purposes heights are necessarily recorded above the geoid ( sea - level ).
  就制图的目的来说,所以需记录的高程是高出大地水准面 ( 海平面 ) 的高程.
  
• The actual equipotential surface of the earth that corresponds to sea level is called the geoid.
  相当海平面的地球实际等位面称为重力平面.
  
• Geiod or quasi - geoid is a height datum for acquiring geospatial information.
  大地水准面或似大地水准面是获取地理空间信息的高程基准面.