Conservation of mass, second Newton's law, and momentum law are introduced into traffic flow to set up traffic continuity equation, Euler's equation, and momentum integral equation.

应用物理学中的质量守恒定律、牛顿第二定律、动量定律等，建立了交通流的连续性方程、欧拉方程和动量方程；

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In accordance with flow characteristics of the catch-water channel, linear increment flow differential equation has been obtained by momentum law, and a numerical method has been made.

本文针对输水廊道的水流特点，应用动量定理建立起输水廊道沿程增量流微分方程，并给出一种数值解法。

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For example, no matter how much a dancer wishes to leap off the floor and then start turning, the law of conservation of angular momentum absolutely prevents such a movement.

例如，无论一个舞者多么想要跳离地板，然后开始旋转，角动量守恒定律绝对阻止这样的动作。

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The Monday marches, which are supposed to continue until the Hartz IV law is repealed, gathered strength in the middle of the month but seemed to lose momentum this week.

ECONOMIST: Ersatz Europeans

While the demobilization has been full of imperfections the process has acquired a momentum of its own that offers a chance for more peace and the strengthening of the rule of law.

CENTERFORSECURITYPOLICY: Columbia: Moving toward more stability