定律

In this paper it is explained that the law of conservation of mechanical energy must Obey the relativity principle of mechanics.

文章系统地阐明了机械能守恒定律无条件服从力学相对性原理，若总机械能在一个惯性系守恒，它就在所有惯性系守恒。

Key words: theorem of kinetic energy; conservation law of mechanical energy; reference frame

动能定理，机械能守恒定律应用

This is the well-known principle of conservation of momentum.

这就是众所周知的动量守恒定律。

This should obviously violate the laws of conservation of linear momentum and energy.

很显然，这违反了线性动量和能量守恒定律。

This is called the 1aw of conservation of momentum .

这称为动量守恒定律。

Take advantage of利用: He made the famous experiment by taking the advantage of law of conservation of momentum.

他利用动量首恒定律完成了那个著名的实验

Based on momentum balance and the law of momentum conservation, two new graphic methods are developed to determine the pre-impact vehicle momentum or collision speed in this paper.

本文根据动量平衡和动量守恒定律的基本原理，提出了两种推算碰撞前汽车动量或碰撞速度的图解方法。

Week 3 Momentum theorem, conservation law of momentum and its application, work of variable force, work of conservative force, potential energy.

第3周 动量定理动量守恒定律及应用；变力的功、保守力的功、势能。

The idea that energy is conserved is the first law of thermodynamics.

能量守恒这一概念是热力学的第一定律。

When assumptions (15.4) and (15.5) hold, one can show that the IV estimator is consistent for b1, after applying the law of large numbers.

当假定(15.4)和(15.5)成立时，可以应用大数定律证明IV估计是b1的一致估计。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。