一、 分析原因常用句型

　　1. The reasons can be listed as follows. For one thing…For another…

　　2. What has contributed to this problem? In the first place…In the second place…

　　3. Perhaps the main/primary/most important reason is…

　　4. It is no easy to identify the reason for… which involve several complicated factors.

　　5. A number of factors could account for/lead to/contribute to/result in/be conductive to…

　　6. One may trace/attribute this problem to…

　　7. This problem may result from/ largely due to/stem from a combination of factors.

　　8. The explanation for this phenomenon involves many complex reasons…

　　9. There are a variety of reasons for this phenomenon.

　　10. There are three reasons for this.