名词中文翻译
中文翻译：膝盖杠杆
同义词：
['knee joint', 'knee lever arm']
例句：
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1.The doctor used a knee lever to help the patient walk.
医生用膝盖杠杆帮助病人走路。
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2.The scientist designed a knee lever to improve the efficiency of the machine.
科学家设计了一个膝盖杠杆来提高机器的效率。
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3. The engineer tested the knee lever before installing it in the car.
工程师在安装汽车的膝盖杠杆之前进行了测试。