名词
中文翻译：Unknown
同义词：
['expander', 'expander unit', 'expander machine']
例句：
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2.
机器
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3.
指物体
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1. The engineer designed the new expander to increase efficiency.
工程师设计了新的扩张器以提高效率。
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2. The expander is used to pump water from a reservoir.
扩张器用于从水库中泵水。
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3. The expander was responsible for expanding the space within the container.
扩张器负责在容器内部扩展空间。