表达不确定的用词：May, seem, be likely to, possible, probably, perhaps, be said that, be said to…

　　in my mind , the following factors/reasons/causes need to be taken into consideration.

　　我认为，我们需要考虑下列因素/原因：

　　There are several reasons for this phenomenon/why…-（as follows）。

　　造成这种现象的原因如下：

　　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 are presented below. 原因如下。

　　There are 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。

　　The first and most important reason is that……

　　第一个而且最重要的原因是______________.

　　One of the reasons that are given for…is that…

　　______________的原因之一是__________________.