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scavenge/
ˈskævɪnʤ
/
1.vt.
清除……中的废物
2.vt.
（在废物中）捡有用的东西
3.vi.
在垃圾中觅食，以垃圾（如食物残渣等）为食
4.vt.[Metallurgy]
提纯，纯化