medium floe

例句：

1. 1. The ship was caught inthe middle of a medium floe.
   这艘船被中密度浮冰困住了。
2. 2. Thepolar bears are known to feed onmedium floes.
   北极熊以中密度浮冰为食。
3. 3. The researchersused a drone to surveythe medium floes inthe Arctic.
   研究人员使用无人机对北极的中密度浮冰进行了调查。