引力

• There is an attraction among these stars .
  在这些恒星之间存在着一个引力。
• Tensiometers can be made small enough .
  引力计可以做得很小。
• We have to submit to law of gravity .
  我们必须服从引力定律。
• We owe to newton the principle of gravitation .
  我们全靠牛顿才知道引力的原理。
• Gravity holds a privileged position .
  引力占有特殊地位。
• Their action is impeded by interionic attraction .
  它们的活动被离子间的引力所制约。
• It 's a property of matter to attract .
  物质有引力。
• The lunar gravity is about one-sixth that on earth .
  月亮的引力大约为地球的六分之一。
• Properties of space must depend on the gravitational potential .
  空间性质一定与引力势有关。
• The moon's grip on objects is not as strong as earth's .
  月球对物体的引力，不象地球的强大。