02/原因

And I would like to present two explanations for this:

对于此，我有如下两点愚见：

The reasons are chiefly as follows.

主要原因如下：

There are numerous reasons why           , and I would like to explore a few of the most important ones here.

为什么            ，原因很多，在此列举几个较为重要的原因。

The reasons arepresented below. 原因如下。

The reare three premier(主要的)/best/ most important, largest, significant, obvious, crucial causes as follows.

以下这些是造成这一问题的最主要/最好/最重要/最大/最有意义/明显/至关重要 的原因。

This is based on the propensity(倾向，原因) of following points. 这基于以下的原因。

The main reason is that..

主要原因是             。

One  very  important  argument  for         is  that...                      的非常重要的原因便是

。

The reasons are quite clear. Above all, ...

原因非常清楚。首先(首要的是)                      。

The first reason can be seen by every person. 第一个原因其实很明显。

Another reason why .....(凑字数，但不可滥用) is that....(有利于写长句) What is also worth noticing is that...

值得一提的是                   。

There is another factor that deserves some words here. 还有另外一个很重要的原因。

A more essential factor why.... Is that

 的更为重要的原因是             。

A further reason why,,,, is that...

 的更深层次的原因是             。

In addition..

 
此外，再者
Moving on to wider themes,                
展开来说，                         。
The second thing that must betaken into consideration is that...
第二个原因也很重要(值得考虑)，亦即           。
Likewise(同样) ， commonsense tells us that...
同样，           ，这是众所周知的。
The third but very important reason is that...
第三个(尽管不是很重要)原因是              。
The third, not the last is that,
第三个原因是           。
The last factor to betaken seriously is...
第三个重要原因是               。
Moreover,furthermore.
 此外，               。
Finally, last but not least.
最后          。