名词
中文翻译：安全油箱
同义词：
['safety reserve', 'emergency reserve']
例句：
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1. The car's engine needs a safety tank to keep it running smoothly.
这辆车的引擎需要安全油箱来保持平稳运行。
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2. The firefighters had to use their safety tanks to fight the fire.
消防员不得不使用他们的安全油箱来对抗火灾。
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3. The driver quickly filled up his safety tank before taking off.
司机在起飞前迅速填满了他的安全油箱。