名词
中文翻译：致命的
同义词：
['perishable', 'fatal', 'lethal']
例句：
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1. The permortal cold made her cough all night.
致命的寒冷让她整晚咳嗽。
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2. The permortal risk of drowning is always present in swimming pools.
溺水的致命风险总是存在于游泳池中。
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3. The permortal danger of fire is often overlooked.
火灾的致命危险常常被忽视。