working parts

基本解释

To keep the inside working parts of your engine clean, use engine oil and fuel that have tested engine cleaning properties.
为保持引擎内部工作部件的清洁，使用经检测具有清洁引擎性能的机油和燃料。
Luckily he had recently purchased a new automobile, the latest Mercedes, because on that day he tested all its working parts.
幸运的是，当时他正巧刚买了一辆新车，最新款的奔驰，因为在那天，他测试了那辆车所有的零部件。
Check working parts and report.
检查工作部件并报告。
blog.sina.com.cn

Harvard is working with officials and medical experts in many parts of the world to identify the barriers and help countries eliminate them so women can be screened and diagnosed in the early stages when breast cancer can still be treated.
So biomedical engineers have been working for many years on how to design replacement parts for joints like the hip: the artificial hip is the most well developed of those.
因此,生物医学工程师花了很多年时间,致力于设计像髋关节这样的关节替代品,尤以人工髋关节的研究最为成熟
耶鲁公开课 - 生物医学工程探索课程节选
It's rather than working on isolating the parts and trying make one part of your body big,
这不是单独练习各个部分，试图把某一部分的肌肉练得很大，
要拥有好身材 - SpeakingMax英语口语达人

Lean and muscular, his iron-gray hair in a crewcut, Clooney looks like a gun—almost all his working parts appear to have a deadly function.
NEWYORKER: The American