drift·wood /ˈdrɪftˌwʊd/
浮木;社會上的寄生蟲
Drift·wood n.
1. Wood drifted or floated by water.
2. Fig.: Whatever is drifting or floating as on water.
The current of humanity, with its heavy proportion of very useless driftwood. -- New Your Times.
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driftwood
n : wood that is floating or that has been washed ashore