定律

Before and after their collision, they meet law of conservation of momentum and law of conservation of energy.

两个物体的运动轨迹相交时，将发生碰撞、干涉，在碰撞前后满足动量守恒和能量守恒定律。

The law of conservation transformation of energy is the chief basis of physical,astronomical chemical reasoning as well as of engineering practice.

能量守恒和能量转换的定律，不仅是工程实践的主要根据，而且也是8tt t 8。

The law of conservation and transformation of energy is the chief basis of physical, astronomical and chemical reasoning as well as of engineering practice.

能量守恒和能量转换定律不仅是工程实践的主要基础，而且也是物理、天文以及化学等方面的主要基础。

Chemical energy changes into light and heat energy, which agrees with the law of conservation of energy.

燃料燃烧时，化学能就转化为光和热能，这和能量守衡定律是一致的。

The law of conservation and transformation of energy states that energy is indestructible and the total amount of energy in the universe is constant.

参考译文：能量守恒和转换定律说明：能量是不灭的，宇宙间能量的总量和是不变的。

We believe that the law of conservation and conversion of energy will ultimately assist scientists in achieving the grand unified theory.

我们相信能量守恒和转换定律将最终帮助科学家实现微观和宏观物理理论的"大统一"。

Starting from the conditions of law of conservation of energy and angular momentum,how to deal with simple disposal of several physical equations of the planetary motion by applying the elementary mathematical equations is proposed.

从角动量和能量守恒定律出发，建立行星椭圆运动的轨道方程，导出行星运动时的各个物理量表达式，从而给出了一种以初等数学为基础的处理行星运动的简洁方法。

If a body is in the absence of any external torque, the angular momentum of the body is a constant. This is known as law of conservation of angular momentum.

如果物体所受的合外力矩等于零，或者不受外力矩的作用，物体的角动量保持不变，这个结论叫做角动量守恒定律。

The law of conservation of angular momentum may be demonstrated with a gyroscope.

角动量守恒定律，可以用回转器来演示。

With a simple symmetrical electromagnetic field,the law of conservation of momentum and the law of conservation of angular momentum for electromagnetic field and charges system are investigated.

利用简单对称性的电磁场，讨论了场和电荷系统遵从的动量守恒、动量矩守恒定律

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％。