以下为句子列表：
英文: Metallic materials with high strength and high tenacity have been applied to products such as armors ,speedboat, automobiles ,bulletproof vest and steel helmet,etc.
中文: 高强高韧金属材料已应用于装甲、快艇、汽车、防弹衣、钢盔等。
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英文: To protect himself, Ruiz used to wear a bulletproof vest under his suit jacket, but the vest was bulky and hot.
中文: 为了保护自己，儒兹曾经在他的西装外套下穿一件防弹背心，不过这个背心又大又热。
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