pay rock的用法和樣例：
例句
- The Pre-cambrian alumino-siliceous slate is the host rock of antimony deposit inHunan.
湖南前寒武系的硅鋁質板岩是銻礦主要賦礦岩性。 - The stability of ore and rock in Lianjiang Silver Mine is very poor so that an overhand slice and drift mining with cemented tailings filling was used for mining.
廉江銀礦的礦岩穩固性很差，採用上向進路尾砂膠結充填採礦法。
