preservers
n.
保护者，保存者( preserver的名词复数 );
例句:
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The police are the preservers of law and order.
警察负责维持治安。
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Cheerfulness And contentment are great And famous preservers of youthful looks.
快乐和满足是最高档的美容产品最名牌的抗衰老制剂.
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They have to wear helmets and life preservers, and sign multiple waivers.
来自NEWYORKER
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Of course, many conservatives want to get rid of life preservers altogether.
来自CNN
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It's as if millions of Americans are drowning while Republicans stand on the shore, hoarding life preservers by the armfuls.
来自CNN