在商业信函中，如何解释某件事情的原因呢？下面就介绍几种说明原因的常用表达方式。

1. This is owing to...

We have been forceto raise our prices. This is owing to the increase in production costs.

我方不得不提高价格，这是因为生产成本提高了。

注意：owing to 通常用于不好的消息，这个句型还可以写为 This is owing to the fact that...， 如：

We have been forced to delay the delivery of the goods. This is owing to the fact that airline pilots are going on strike.

我方不得不推迟发货，这是因为飞行员正在举行罢工。

2. This is due to...

We have been forced to cut salary by 2%.This is due to a sharp fall in netprofit in the past year.

我们不得不削减2%的工资，这是因为在过去的一年净利润急剧下降。

3. This is the result of ...

We are able to increase salary by 5%.This is the result of a big rise in netprofits this year.

我们能够提高5%的工资，这是因为今年净利润大幅上升。

4. This is becaude...

We have been forced to cancel the order. This is becuase we suffer from financial crisis.

我方不得不取消订单，这是因为我们遭遇了金融危机。’

欢迎补充。