Leading cause

Leading cause 主要原因

Smoking is one of the leading causes of lung cancer。
吸烟是好敏#癌的主要原因。

1. I need you to send a signal and find the leading cause.
2. The authorities arrived on the scene at once to find the leading cause.
3. I need you to find the leading cause of the plane flying off the course.
4. It was not long before we had found the leading cause.
5. This is a leading cause of the forest fire.