Rockalln.罗考尔rockn.岩石；摇滚乐；困境vt.使震惊；摇动；使动心vi.来回摇动；跳摇摆舞rockfill diversion weir堆石导流堰,堆石引水堰rock covering thickness岩石覆盖层厚度rock fracture toughness岩石断裂韧度rockmass structure type岩体结构类型rock paintings of India印度岩画rock excavation in town城镇石方Rock-haunting ringtailn.岩卷尾袋貂rocks of provenance area蚀源区岩石rock and coal perforater石岩煤层打眼机rock mass classification岩石分级

1. The climbers had to negotiate a steep rock face.
   攀登者必须攀越陡峭的岩壁。
2. The wall of rock gave back loud echoes.
   岩壁送回了洪亮的回声。