cause for formation

• 成因

cause for formation的用法和样例：

例句

1. The obliquity of the ecliptic is the fundamental cause of the seasons.
   黄道的倾角是季节的基本成因。
2. Secondly, I expound the trend and reason for the administration legislates.
   其次，阐述了行政立法的发展趋势及成因。