名词
中文翻译：手动元素
同义词：
['manual component', 'manual device例句：1. The manual element in this system is crucial for its operation.（这个系统中的手动元件对于其运行至关重要。）']
例句：
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1. The manual element in this system is crucial for its operation.
这个系统中的手动元件对于其运行至关重要。
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2. The engineer carefully assembled the manual element before testing it.
工程师在测试之前仔细组装了手动元件。
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3.The manual element was designed to be easily replaced if needed.
手动元件设计成易于更换，如果需要的话。