axial whirl

例句：

1. 1. The machine has an axial gear that can be adjusted to change speeds.
   这台机器有一个可调节的轴齿轮，可以改变速度。
2. 2. The axis of the planet revolves around the sun.
   行星的轴线围绕太阳旋转。
3. 3. The scientists found that the axis of the earth's rotation is tilted at about 23 degrees.
   科学家们发现地球自转的轴线大约倾斜了23度。