名词
中文翻译：轴心鞍座
同义词：
['axle', 'axle box', 'axle carrier']
例句：
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1.The car's axle is damaged, so it won't start.
这辆车的轴坏了，所以不能启动。
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2. The axle of the wheel is loose, and it needs to be tightened.
车轮的轴松了，需要拧紧。
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3.When the axle was replaced, the car started right away.
当轴被更换后，汽车立刻就能启动了。