Geologists have studied the way that heat flows from the earth.地质学家曾研究过热量如何散出地球。We need helpers of all types, engineers, scientists (e.g. geologists) and teachers.我们需要各方面的帮手：工程师、科学家（例如地质学家）和教师。By drilling, geologists can...
他个人已收到莱曼司令要求凿沉轮船的命令。He personally had received orders from Commander Lehmann to scuttle the ship.他把一根树干凿成独木舟.He hewed a canoe out of a tree trunk.为了修建这条隧道,我们必须凿开坚硬的岩石.To build this tunnel we had to cut through the solid ...