pure natural force

• 单纯的自然力

pure natural force的用法和样例：

例句

1. It's really an awesome force when you think about it.
   在你脑海中，它的确是可怕的自然力。
2. Rain and frost are natural agents that wear away rocks.
   雨和霜都是磨蚀岩石的自然力。