名词
中文翻译：备用受体
同义词：
['spare receptor', 'spare receptor', 'spare receptor']
例句：
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1. The spare receptor is used to filter out pollutants from the air.
备用受体用于过滤空气中的污染物。
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2. The spare receptor can be used as a backup system in case of power failure.
备用受体可以在电力故障时作为备用系统使用。
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3. The spare receptor is designed to provide additional protection for the main system.
备用受体旨在为主要系统提供额外的保护。