防御

例句：

1. 1.The police are defending the city from the rioters.
   警察正在保护这座城市免受暴乱者的攻击。
2. 2.He was accused of defending his friend against a false accusation.
   他被指控为他的一个朋友辩护，反对一项不实的指控。
3. 3. The company is defending its products in court.
   该公司正在法庭上为其产品辩护。