There are several reasons for…, but in general, they come down to three major 有一些原因，但总的来说，归结为三大原因。

There are many factors that may account for…, but the following are the most typical 有很多因素可以解释…，但以下是最典型的因素。

Many ways can contribute to solving this problem, but the following ones may be most 许多方法可以有助于解决这个问题，但以下的可能是最有效的。

Generally, the advantages can be listed as 一般而言，优势可以列举如下。

The reasons are as 其原因如下。