他们决定发动先发制人的攻击。
对一个主权国家进行先发制人的攻击会引起道德和法律上的争议。
A preemptive strike against a sovereign nation raises moral and legal issues.
德国导游拉尔夫刚给了我一把毛瑟枪，这是用来防备北极熊首先发动攻击的。
Our German guide, Ralph, had just handed me the Mauser rifle we would have to use if a polar bear attacked him first.
应用推荐