first law of motion

1. Newton's first law of motion is not as self-evident as it may seem.
   牛顿第一运动定律并不是一看就能明白的。
2. A coordinate system in which Newton's first law of motion is valid.
   牛顿第一运动定律成立的参照系统。
3. According to newton's first law of motion a body is in motion but actually never is there a body which will remain in motion forever because it is impossible to get rid of external influence.
   根据牛顿第一定律，运动的物体会一直运动，但实际上决不会有一直运动的物体，因为它不可能摆脱外部作用力的影响。
4. This subject was first soundly established in the 17th century on the basis of the axiom usually known as Newton's law of motion.
   这门学科最初是在17世纪根据通常称为牛顿运动定律的原理完整地建立起来的。
5. Dialectical understanding newton's first law of motion
   牛顿第一定律的理性反思

noun

1. a body remains at rest or in motion with a constant velocity unless acted upon by an external force

   Synonym:    Newton's first law of motionNewton's first law