water crane sign

例句：

1. 1.The water crane sign is a symbol of the river's health.
   水鹤标志是河流健康的象征。
2. 2.The fishermen used to use this sign to warn other boats of their presence.
   渔民过去使用这个标志来警告其他船只他们的存在。
3. 3. The sign was removed from the bridge after the accident, as it could be dangerous for pedestrians crossing the river.
   事故后，该标志被从桥上移除，因为它对过河的行人来说是危险的。