上游充通大￥ Shanghai Jiao Tong University 海岸示意图 Label the features on the diagram below: 海湾 环礁湖 lagoon lagoon bay barrier spit islands spit bay mouth bar beach 岬；沙嘴 tombolo 连岛沙洲Shanghai Jiao Tong University 海岸示意图 Label the features on the diagram below: bay lagoon lagoon tombolo spit beach bay mouth bar spit barrier islands 海湾 环礁湖 连岛沙洲 岬；沙嘴