Mississippi river-type buoy

例句：

1. 1. The Mississippi River is the longest river in the United States, and its type buoys are used to mark important landmarks along its banks.
   密西西比河是美国最长的河流，其类型浮标被用来在河岸的重要地标上标记。
2. 2. The buoy was designed to help fishermen find their way back to the shore after a long day at sea.
   这个浮标被设计来帮助渔民们在海上度过漫长的一天后找到回家的路。
3. 3. The buoy was a symbol of safety for all who were near the river during the flood.
   这个浮标是所有在洪水期间靠近河流的人的安全象征。