solution opening

• 溶洞

solution opening的用法和样例：

例句

1. Induced porosity is typified by fracture development as found in some shales and limestones and by the vugs or solution cavities commonly found in limestones.
   次生孔隙度是以某页岩和石灰岩的裂缝和石灰岩中的岩穴和溶洞为代表。