noun 下载 🔗分享 砂岩,粗砂岩 A form of sedimentary rock, similar to sandstone but coarser. Examples : "The climbing wall was made of rough gritstone, making it challenging to grip. " 攀岩墙是用粗糙的粗砂岩做的,很难抓牢。 geology material 与AI对话词汇游戏阅读练习