danger buoy

例句：

1. 1. The ship was anchored in the harbor, with a danger buoy marking its location.
   这艘船停泊在港口，危险浮标标示了它的位置。
2. 2.The lifeboat was equipped with a danger buoy to alert passing vessels of the imminent danger.
   救生艇配备了一个危险浮标，以警告过往船只即将发生的险情。
3. 3. The captain ordered the crew to remove the danger buoy from the riverbank before they started their search.
   船长命令船员们在开始搜寻之前，把危险浮标从河岸上移开。