质量重心的速度，并没有发生改变，你在参照系中可以看出，因为质量重心的速度，总是保持不变，要记住，由于动量守恒。
The velocity of the center of mass has not changed as seen from your frame of reference, because the velocity of center of mass is always the same, remember, because momentum is conserved.
要记得，在这里的fx中,是作为常量保持不变的。，looking，at，the，situation，where，y，is，held，constant。,这是我用一个平行于xz坐标系的平面,横截了f，所得到的图形。
Remember, partial f, partial x was obtained by y That means I am slicing the graph of f by a plane that is parallel to the x, z plane.
如果有此能力的灵能游荡者受到惑控系法术或效果影响并在豁免检定中失败，他可以在一轮后再次尝试检定，DC不变。
If a psychic rogue with slippery mind is affected by an enchantment spell or effect and fails his saving throw, he can attempt it again 1 round later at the same Difficulty Class.
首先，利用共线性和欧氏距离不变性这两个特性可以求得图像中的点在相机坐标系（CCS）中的坐标。
First, the counterparts of the points on image in camera coordinate system (CCS) are found by utilizing two properties, namely collinearity and Euclidean distance invariability.
在供水系统中，恒压供水是指在供水网系中用水量发生变化时，出口压力保持不变的供水方式。
In water supply system, water supply in constant pressure means that terminal pressure keeps constant all the time when the quantity of dispended water varies.
摩尔数保持不变，因为是闭系，气体不会跑出去。
The number of moles stays the same a closed systems, gas doesn't come out.
这段婚姻只可能因爱而起，靠不变的愿望来维持，和用对彼此的爱来紧紧相系。
This marriage can only be created by loving purpose, be maintained by abiding will and be bonded together by you love for one and another.
根据影响函数法计算轧辊凸度对辊缝设定的影响，当保持工作辊和支承辊凸度不变，则轧制力与辊系弹性变形呈线性关系，工作辊和支承辊凸度的变化对直线的斜率几乎没有影响。
By the influence function method the influence of plate width, work roll radius, backup roll radius, work roll crown, backup roll radius and rolling force on gap setting were calculated.
系好同心锁后，对她说：“与你同心，对你忠心，一片痴心，永不变心。”
After tying your love locks, tell her "Our hearts will be united, and I will be loyal to you, infatuated by you and never change my heart."
提出了采用旋转坐标系的方法，以保持叶型头部原有的形状及流道内流线的相对位置不变，经验证得到了很好的结果，可以应用于大多数轴流压气机的计算与分析。
A method is proposed, using rotating coordinate to keep the head with leaf-like shape and to hold the relative position of streamlines in flow channel. The method is effectively tested and can...
因为标量与坐标系无关，故两个矢量的点积称为标量不变量。
Formulae on the base vectors and the coordinate variables derivative going with fluid particle and their application;
因为标量与坐标系无关，故两个矢量的点积称为标量不变量。
Formulae on the base vectors and the coordinate variables derivative going with fluid particle and their application;
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