central principal axis of inertia

例句：

1. 1.The central principal axis of inertiais the point where the mass and momentof inertia are equal.
   惯性质心主轴是质量与惯性矩相等的点。
2. 2. The design of this machine is basedon the central principal axis of inertia.
   这台机器的设计基于惯性质心主轴。
3. 3. The engineer used the central principal axisof inertia to calculate the rotational speed of the motor.
   工程师利用惯性质心主轴来计算电机的转速。