名词
中文翻译：关节球
同义词：
['ball joint', 'ball joint bearing']
例句：
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1.The engineer designed a new ball joint to improve the vehicle's performance.
工程师设计了一个新的关节球，以提高车辆的性能。
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2.The ball joint is essential for maintaining the smooth movement of the machine.
关节球对于保持机器的平滑运动至关重要。
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3. The ball joint was damaged during the accident, which caused the vehicle to lose power.
在事故中，关节球受损，导致车辆失去动力。