预示后果的句子：

　　Obviously, if we don't control the problem, the chances are that … will lead us in danger.

　　很明显,如果我们不能控制这一问题,很有可能我们会陷入危险.

　　No doubt, unless we take effective measures, it is very likely that …

　　毫无疑问,除非我们采取有效措施,很可能会……

　　It is urgent that immediate measures should be taken to stop the situation.

　　很紧迫的是,应立即采取措施阻止这一事态的发展.

　　给出原因的句子：

　　This phenomenon exists for a number of reasons. First, … Second, … Third, …

　　这一现象的存在是有许多原因的.首先,……;第二,,……;第三,……

　　Why did …? For one thing …,for another …. Perhaps the primary reason is…

　　为什么会……?一个原因是……,令一个原因是……;或许其主要原因是……

　　I quite agree with the statement that … The reasons are chiefly as follows.

　　我十分赞同这一论述,即……,其主要原因如下: