1：Obviously，if we don't control the problem, the chances are that……will lead us in danger.(很明顯，如果我們不能控制這一問題，很有可能我們會陷入危險(xiǎn))
　　2：No doubt, unless we take effective measures, it is very likely that ……(毫無疑問，除非我們采取有效措施，否則我們很可能會……)
　　3：It is urgent that immediate measures should be taken to stop the situation(很緊迫的是應(yīng)立即采取措施阻止這一事態(tài)的發(fā)展)