biological and chemical attack

• 生化袭击

biological and chemical attack的用法和样例：

例句

1. You prepare for the possibility of some form of bombing, some form of chemical or biological attack.
   你要为轰炸的可能性和生化袭击的可能性做好应付的准备。
2. Second, we must prevent the terrorists and regimes who seek chemical, biological, or nuclear weapons from threatening the United States and the world.
   第二，我们必须阻止恐怖分子及支持他们的国家发动威胁美国和全世界的生化袭击和核袭击。