在加工端面、圆弧、圆锥以及蹊径直径相差较大的零件时，沿X轴方向进给时，固然进给速度不变，但切削线速度却不断地变化，导致加工表面质量变化。
In the end, arc, processing and ground is large diameter conical parts, along the X axis into to, is the same, but the linear cutting speed is constantly changing, the cutting surface quality changes.
转动惯性：物体在绕着自己的对称轴转动时，具有保持转速和转动轴方向不变的性质。
Moment of inertia: turning around its axis of symmetry, object has the character keeping speed and the direction of the axis of rotation not changing.
对不同种类土样的试验表明，控制试样侧向不变形的灵敏度高，达到了K_0固结三轴剪切试验的要求。
The test results of different kind of soil indicate that it has high sensitivity to control lateral deformation and fulfils the requirement of K0-consolidation triaxial apparatus.
还研究了超高斯光束通过近轴光学系统时，保持其形状和阶数不变的条件。
The condition has been discussed, under which SG beams preserve their shape and order, while passing through paraxial optical systems.
观察结果表明AA5182的晶粒在变形前后保持等轴状态不变，而6016的晶粒在变形中被拉长。
The results show that the grain of AA5182 keeps equiaxed before and after deformation, while that of 6016 was elongated due to tension deformation.
机身及轴头均采用进口材料制作，强度高，能承受超高的压力，绝不变形。
The material of frame and shaft head is imported. It's of high strength that can bear high pressure. It's never deformation.
臂要伸直，并保持伸直的姿式不变，以肩为轴把球拍划出弧线，在肩部的前方勾击来球。
Keeping the arm as stiff as a board, swing it in an arc-like motion from the shoulder, making contact in front of the shoulder.
臂要伸直，并保持伸直的姿式不变，以肩为轴把球拍划出弧线，在肩部的前方勾击来球。
Keeping the arm as stiff as a board, swing it in an arc-like motion from the shoulder, making contact in front of the shoulder.
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