给出原因:

　　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, …

　　hy 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:

　　列出解决办法:

　　Here are some suggestions for handling… 这是如何处理某事的一些建议.

　　The best way to solve the troubles is… 解决这些麻烦的最好办法是…

　　People have figured out many ways to solve this problem. 人们已找出许多办法来解决这个问题.

　　批判错误观点和做法:

　　As far as something is concerned, …. 就某事而言,…

　　It was obvious that… 很显然,….

　　It may be true that…, but it doesn’t mean that… 可能…是对的,但这并不意味着…

　　It is natural to believe that… , but we shouldn’t ignore that…

　　认为….是很自然的,但我们不应忽视….

　　There is no evidence to suggest that… 没有证据表明…