personal flotation device
名词 n.
英文释义
名词 n.
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A life vest or other device or article of clothing designed to be used by one person as an aid to remaining safely afloat in water, especially in an emergency situation.
— Under the new personal flotation device regulations, boats 16 feet and longer must have one wearable type flotation device on board the boat for each person.
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数据来源: Wiktionary