- 不: a block of wood
- 降解: degradation
- 不降解有机化合物: non-degradable organic compounds
- 不降: bu jiang of xia
- 降解: degradation◇降解代谢 katabolism; 降解度 degradability; 降解反应 degradation reaction; 降解塔 degradation tower; 降解作用 degradation
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