通过把极坐标系作为该运动参照系而继续对模式进行积分。
The model is continued by imposing a polar coordinate system on the moving reference frame.
还有一些是半原创、半复刻的—这些综合性雕塑中，一部分不只参照了希腊雕塑，还有一些雕塑把古希腊神像或运动员与罗马人的头颅放在一起。
Some combined more than one Greek statue and others combined a Greek god or an athlete with a Roman's head.
由于参照系—地球—是旋转的，所以在静止参照系中应是呈直线运动，在地球上的观测者看来就成为曲线运动。
Since this frame of reference-the earth –is rotating, motions that would be straight in a stationary frame of reference appear curved to the observer on earth.
在所有的惯性参照系中可能出现的运动全都是同一种类的。
The class of all possible motions is the same in all inertial frames.
请参照10分钟有氧运动锻炼。
尽管如此，金鱼仍能以失真的参照系为基础构建物体运动规律，并且这些规律永远适用。
Nevertheless, the goldfish could formulate laws from their distorted frame of reference that would always hold true.
本文针对系统相对于地球参照系机械能守恒时，在相对于地面作匀速直线运动的参照系中机械能是否依然守恒的问题进行了重新论证。
This article expounds again whether the mechanical energy is in the uniform motion in a straight line, as the mechanical energy is conservative when the system is in the frame of earth reference.
在一列运动中的火车上，人们感觉不到平衡，大地在不断地移动，在你的脑中只有地平线是参照物，其他所有的东西都在运动。
In a moving train one feels out of balance, the earth seems to be constantly moving and your mind has only the horizon as a reference, all the others things are constantly in motion.
研究物体运动时，一定要先设置参照系。
When studying the movements of objects, we must first set up the reference system.
在地球上的人需要有一个地球外的东西作参照物才能察觉到地球的运动。
People on earth could only detect the movement of the earth when they use an object outside the earth as the reference point.
根据狭义相对论，讨论相对于静止参照系运动的源电荷在空间产生的电场。
The field produced by the electric charge moving relatively to the rest system of reference is discussed from the viewpoint of Special relativity.
在一特定的转动参照系中，利用相对运动的速度和加速度合成公式，通过一特定的相对运动简洁地导出常用坐标系中的速度和加速度表达。
Expressions of velocities and accelerations in usual coordinates are simply derived by means of the composition formulae of velocity and acceleration in special rotation reference systems.
相对论告诉我们，没有参照物，你无法定义自己的运动速度。
Relativity means that you can't tell how fast you're going unless you have a point of reference.
我们测量运动员骑车爬坡时的能量(参照图解)。
This is a measure of the energy a rider USES to drive the bike up a hill (see diagram).
目的：描述两节段颈椎间盘置换颈椎运动学情况(参照置换节段及其相邻节段)。
Objective: to characterize kinematics of cervical spines implanted with total disc replacement (TDR) at 2-levels referencing the implanted and adjacent levels.
目的：描述两节段颈椎间盘置换颈椎运动学情况(参照置换节段及其相邻节段)。
Objective: to characterize kinematics of cervical spines implanted with total disc replacement (TDR) at 2-levels referencing the implanted and adjacent levels.
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