海岸警卫队正在清理沉船后漂浮在水面上的残骸。

The coast guard is cleaning up the ___flotsam floating on the water after the shipwreck.

海滩上散落着各种被海浪冲上来的废弃物和无人认领的漂流物。

The beach was littered with various pieces of ___flotsam washed ashore by the waves.