If you want to say "the reasons are as follows" in English, you can say "the reasons are as follows" or "the following are the reasons". This phrase is commonly used to introduce a list of reasons or explanations for something. Here are some example sentences and their translations:

The reasons for my decision are as follows: first, I want to spend more time with my family; second, I want to pursue a different career path. (理由如下：首先，我想花更多的时间与家人在一起；其次，我想走一条不同的职业道路。)

The following are the reasons why we decided to cancel the trip: bad weather, lack of interest, and lack of funding. (理由如下：坏天气，缺乏兴趣和资金不足。)

After conducting a thorough analysis, the reasons for the company's poor performance are as follows: declining sales, high costs, and low customer satisfaction. (经过彻底分析，公司经营不善的原因如下：销售下降，成本高，客户满意度低。)