动量被认为是“守恒的”，也就是说，动量一旦被建立，就一定会转移到其他地方。
Momentum is said to be "conserved", that is, once you build it up, it has to go somewhere.
你看，这正是，验证动量守恒的方法。
So, you see, that's exactly how you can demonstrate the conservation of momentum.
也就在反应期间,我有个合理假设，动量是守恒的。
It's just during the impact I claim that to a reasonable approximation, momentum will have to be conserved.
如果违反能量守恒的持续时间不太长，那么自然界并不反对这种违反。
Nature has no objection to a violation of energy conservation, provided (that) the violation does not last too long.
这种观点和热质论关于热量守恒的观念相矛盾。
This is in contradiction to caloric-theory notion of conservation of heat.
根据弱荷的手征性，合理地解释了宇称不守恒的原因。
According to the chirality of the weak charge the origin of parity nonconservation in the weak interactions is reasonably explained.
因此等式(1.1- 11)可以作为粒子几率守恒的表达式。
Equation 1. 1-11 is thus a statement of the conservation of particle probability.
在文中引入了扩展全空间概念，由此得到电荷守恒和电流守恒的一般形式。
This paper introduces the concept of extended total space, and then we extend conservation of charge and conservation of current to general case.
通过推导证明了只有使内边界数值通量守恒才能使并行后的总体数值格式是守恒的。
Through derivation the present thesis proves numerical value flux conservation of sub-domains interface boundary can make parallel numerical schemes conservative.
本文由力学的普遍原理——虚功原理推导出了三维情况下J积分守恒的一般形式；
The general form of J-integral conservation law in three dimensions has been derived from the principle of virtual work.
从能量守恒的基本原理出发，讨论了键合图中的多通口元件MTF所具有的性质。
From the viewpoint of energy conserving, the properties of bond graph multiport element MTF are discussed.
分析了机械能守恒的内涵及条件，对有的教材关于机械能守恒定律的表述提出了不同的见解。
This article analyses the meaning and prerequisite of conservation of mechanical energy, and poses different standpoints on describing the law of conservation of mechanical energy in some textbooks.
电荷不仅由衰变“前”到衰变“后”是守恒的，而且在衰变过程的每一个中间的阶段也都是守恒的。
The charge is conserved not only from "before" to " after " but also at every intermediate stage of the process.
为了减缓计算网格数很多时对计算机内存的压力以及提高计算效率，运用了通量守恒的分区计算方法。
To relax the demand on computer memory and to raise the efficiency when the computational grid number is very large, the flux conservation multizone methods are applied.
分析讨论了角动量守恒定律在空翻、转体以及旋空翻等竞技动作中的具体应用。
This paper analyzes and discusses specific application of the conservation law of angular momentum in competitive sports, such as aerial tumbling, trunk rotation and somersault.
必须记住，动量守恒甚至对于非弹性碰撞也是成立的，尽管这时动能已不守恒。
It is important to realize that momentum conservation applies even to inelastic collisions, in which the kinetic energy is not conserved.
这一原理，也即能量守恒，是物理学中最宝贵的定律之一。
This principle, called conservation of energy, is one of our most cherished laws of physics.
下一阶段，具体运算阶段，七到十二岁，儿童可以解决守恒问题，但儿童的抽象推理能力仍然有限。
The next phase, concrete operations, from seven to twelve, you can solve the conservation problem, but still you're limited to the extent you're capable of abstract reasoning.
力学系统的对称性与精确不变量（守恒量）在力学、物理学中具有非常重要的意义。
The studies on symmetries and exact invariants (conserved quantities) play a very important role in mechanics and physics.
动量守恒原理则不管内力的性质如何（保守的或非保守的）都能适用。
The principle of conservation of momentum holds whatever the nature of the internal forces, conservative or not.
因此，能量守恒应当作为大洋环流模式的重要约束之一。
Thus, the conservation of energy may be one of the most important constraints for oceanic general circulation models.
（德国数学家）Noether所发现的是，只要在自然界呈现连续对称性（的地方），守恒定律就一定成立，反之亦然。
What Noether discovered is that whenever nature displays a continuous symmetry, a conservation law comes along for the ride, and vice versa.
它讲的是能量的守恒。
物理世界中存在着一些守恒定律，其中有些是严格的，有些是近似的。
In the physical world there exist a number of conservation laws, some exact and some approximate.
能量守恒是科学家已发现的关于宇宙的最基本的规律。
Conservation of energy may be the most basic rule that scientists have yet discovered concerning the universe.
所有这些各种各样的损耗，尽管它们数量很大，却一点也不违反能量守恒定律。
All these various losses great as they are do not in any way contradict the law of conservation of energy.
译：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推理的主要基础。
The law of conservation and transformation of energy is the chief basis of physical, astronomical and chemical reasoning as well as engineering practice.
杨振宁和李政道因为在弱相互作用下宇称不守恒原理方面的工作获得了1957年的诺贝尔物理学奖。
Yang received the 1957 Nobel Prize in Physics together with Tsung-dao Lee, for their work on parity non-conservation of weak interaction.
杨振宁和李政道因为在弱相互作用下宇称不守恒原理方面的工作获得了1957年的诺贝尔物理学奖。
Yang received the 1957 Nobel Prize in Physics together with Tsung-dao Lee, for their work on parity non-conservation of weak interaction.
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