引力

• Inertial forces and gravitational forces are indistinguishable .
  惯性力与引力是不可区分的。
• Interfacial tractions at the broken ends will produce delamination .
  断头处的界面引力将引起分层。
• 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。
• 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 pull causes the sometimes dramatic rise of water level in the ocean .
  这种引力有时引起海洋水面的剧烈上升。
• The law of gravitation explains many phenomena not previously, understood .
  引力定律解释了许多以前所不能理解的现象。
• Newton's theory of gravitation is an approximation of a more general theory .
  牛顿的引力理论只是一种更普遍理论的近似形式。
• If the energy ratio is low, the hot gas is held in by the gravity of the galaxy .
  若能量比较低，热气体将被星系的引力拘留。
• Gravity, although the weakest known force, is the only universal force .
  引力虽然是已知力中最弱的力，它却是唯一普遍存在的力。
• When the dimensions of the source are large, it is necessary to extend the theory .
  当引力源的体积很大，就需要对原理加以引伸。