gravity

• The force of gravity pulls things towards the earth 's center .
  地心吸力把物体吸向地心。
• Obviously the force of gravity mg is acting vertically downward .
  显然重力的Mg作用垂直向下。
• The moon's gravity pulls the waters of the earth into a bulge .
  月球引力吸引地球上的水，形成涨潮。
• the oil recovered has a gravity of 38° a.p.i.
  重新找到的原油比重为38API。
• The particle motion is dominated by inertia and gravity effects .
  粒子的运动是由惯性和重力作用决定的。
• The girl in the picture can blame gravity for her tumble .
  图中的那个女孩可能正埋怨地心引力使她摔倒呢。
• A photon leaving the sun will be "retarded" by the sun's gravity .
  离开太阳的光子因受太阳引力而“减速”。
• This water was distributed to and over the fields primarily by gravity flow .
  这些水主要靠自流灌溉到田里。
• His present gravity arose from true wisdom and philosophy .
  他现在的这种庄重态度原是出于真知灼见和洞明哲理。
• The major's gravity was entirely upset, and he burst out laughing .
  少校的威严一下子变得无影无踪，他不觉放声大笑。