名词
中文翻译：单级机
同义词：
['single-stage machine', 'single-level system']
例句：
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1. This single-level machine is designed to simplify the assembly process.
这款单级机器的设计目的是简化组装过程。
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2. The single-level machine has been proven to be more efficient than traditional methods.
这款单级机器已被证明比传统方法更高效。
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3. The single-level machine was developed specifically for this type of work.
这款单级机器是专门为这种工作设计的。