metal ketyl radical

例句：

1. 1.The metal ketyl radical is a powerful antioxidant that can protect cells from damage.
   金属烷基自由基是一种强大的抗氧化剂，可以保护细胞免受损害。
2. 2.The metal ketyl radical has been shown to have antibacterial properties.
   金属烷基自由基已被证明具有抗菌性质。
3. 3.The metal ketyl radical has been used in the production of various chemicals and materials.
   金属烷基自由基被用于生产各种化学品和材料。