名词
中文翻译：副电池
同义词：
['auxiliary battery', 'auxiliary power supply']
例句：
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1. The submarine's main battery is not functioning properly.
潜艇的主电池功能不正常。
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2. Thesubmarine'ssubballast system needs tobe checked regularly.
潜艇的副电池系统需要定期检查。
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3. The submarine's subballast tank was filledwith fresh water.
潜艇的副电池水箱被注满了淡水。