- 没有人能告诉原因。
No one can tell the reason.
- 爆炸的原因是什么？
What was the cause of the explosion?
- 火灾的原因不明。
The cause of the fire was unknown.
- 这就是我为什麽回来的原因。
This is why I came back.
- 你怎么解释你缺席的原因？
How do you account for your absence?
- 结婚是所有离婚的主要原因。
Marriage is the main cause of all divorces.
- 生肖的十二种动物裡没有猫的原因很简单。
The reason the cat is not included in the 12 animals of the Chinese zodiac is very simple.
- 起火原因不明。
The cause of the fire is not known.
- 由于台风原因，很多航班被取消了。
Many flights were canceled, owing to the typhoon.
- 不可做的原因多了。
There are many good reasons not to do it.
