natural rock

• 原生岩,天然岩石

natural rock的用法和样例：

例句

1. Sawing with diamond abrasive tools is the most important method for the processing of natural stone.
   使用金刚石工具的锯切加工是切割天然岩石材料的最主要方式。
2. This freeze-thaw cycle, a common form of erosion of natural rocks, too, weakens a structure directly and also exposes steel reinforcing rods to water, causing them to rust.
   这种作为侵蚀天然岩石的常见形式的冻融循环，同样会直接削弱建筑物，并且还使钢筋条与水接触而导致他们生锈。