这个周日我们与运动系有一场比赛。
确定了相对静止系、相对匀速运动系、相对加速运动系的概念。
Some concepts such as relative rest reference frame, relative uniform motion reference frame, and relative accelerated motion reference frame was confirmed.
与其开车到处跑，不如系好鞋带，一边运动一边省汽油。
Instead of driving everywhere, lace up your sneakers and get some exercise while you save gas.
我记得他穿著运动鞋，没有系领带。
登山运动员们用一条绳子相互系起来，一切就绪准备出发。
而旋度度量了，运动中的旋转情况，这跟坐标系的选择有关。
And when I say that the curl measures the rotation in a motion, well, that depends on which coordinates you use.
在水斗三维贴体坐标系中，还推导了流体粒子在水斗曲面上的运动控制方程。
The governing equation of motion for fluid particles moving on bucket was deduced on BFC at the same time.
公司调查了2,000名司机，分为四类：经济型、中型、运动型多功能汽车(SUV)和豪华型汽车(如宝马7系或梅赛德斯m级汽车)司机。
The company polled 2,000 drivers, broken into four categories: drivers of economy cars, midsize, sport-utility vehicles and luxury (like BMW 7-series of Mercedes m Class).
浪漫主义运动起初与哲学是并无关联的，但不久之后二者便彼此相系。
The romantic movement was not, in its beginnings, connected with philosophy, though it came before long to have connections with it.
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.
自从哥白尼以后，观察并记录太阳系的运动的工作已经做得很多。
Much work had been done since Copernicus to observe and record the movements in the solar system.
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.
他只要考虑一下这样的例子就行了：太阳系中行星的运动可以根据少数几条简单的定律，事先非常准确地计算出来。
He need only consider that planetary courses within the solar system may be calculated in advance with great exactitude on the basis of a limited number of simple laws.
上篇包括三章内容，系新启蒙运动基本史实研究。
The first section which includes three chapters is the study on basic historical facts of the New Enlightenment Movement.
这公式在决定车床心轴和丝杆之间的运动学关系时很有用，并且提供了正确挑选它们之间轮系的方法。
This equation is useful in determining the kinematic linkage between the lathe spindle and the lead screw and enables proper selection of the gear train between them.
作用在任意运动物体（系）上的力和力矩可以分别表示成流场中动力学涡量的一阶矩和二阶矩随时间的变化率。
The force and moment exerted on the solid body are expressed as the rate of change of the first-and second-order kinetic vorticity moments, respectively.
再次，如运动学模型中的杆件的弹性变形也是存在的，忽略了这些杆系的变形也会有一定的误差。
Once again, such as the kinematic model of the pole pieces of the elastic deformation also exists, and ignores the deformation of the truss will also have some error.
但是这方面的公正和民权运动通常所系的任何问题都毫不相关。
But this aspect of justice had nothing to do with any of the issues ordinarily associated with the civil-rights movement.
这取决于几个因素，包括（从地球附近经过的运动轨迹类似于彗星的太阳系第十二行星所携带的）红色尘埃用多少时间穿越地球大气层沉淀到它被第一次近距离观察并报告的地方。
This depends upon a number of factors, including how well the dust drops through the atmosphere to be deposited on land where the very first evidence will be closely watched for and thus observed.
经典力学中有关质点系的运动定律已经表述得相当清楚。
The particle system movement rule has been stated clearly in the classical of force.
差动行星轮系能够对运动进行合成和分解。
The differential planet gear train could carry out composition and resolution on movements.
旋翼阻抗由旋翼在固定坐标系中的运动方程得到，这个运动方程由旋翼旋转坐标系中的桨叶模态方程导出。
The rotor impedance is calculated from the rotor equations of motion in the fixed- coordinate system derived from the modal equations of blade in the rotating-coordinate system.
旋翼阻抗由旋翼在固定坐标系中的运动方程得到，这个运动方程由旋翼旋转坐标系中的桨叶模态方程导出。
The rotor impedance is calculated from the rotor equations of motion in the fixed- coordinate system derived from the modal equations of blade in the rotating-coordinate system.
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