短语词组短语red -sandstone embankment 红砂岩路基red medium -weathered sandstone 中风化红砂岩road -bed of red-sandstone 红砂岩路基rock -socketed piles in red-sandstone 红砂岩嵌岩桩coarse -grained red sandstone soil 红砂岩粗粒土 返回 red-sandstone