防备

例句：

1. 1. The policemen were defending the city from the rioters.
   警察们正在保卫这座城市免受暴乱者的攻击。
2. 2.She defended her honor by denying the allegations.
   她通过否认指控来维护她的名誉。
3. 3. The company is defending its products against criticism.
   该公司正在为其产品辩护，以抵御批评。