名词
中文翻译：Unknown
同义词：
['pad', 'cushion', 'protector']
例句：
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2.
用于
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3.
用于
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1.She placed the pad under her chair to make it more comfortable.
她把垫子放在椅子下面，让它更舒服。
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2.The old man used a pad to protect his knees from the cold floor.
老人用一个垫子来保护他的膝盖免受寒冷地板的损伤。
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3.The soldier used a pad to protect his head from the bullets.
士兵用一个垫子来保护他的头部免受子弹的伤害。