短語詞組短語die -away time 衰落時(shí)間;衰減時(shí)間time die -away 衰減時(shí)間depressible die -away low 消沉的DOC die -away test DOC消減試驗(yàn)Aerobic die -away degradation method 模擬曝氣法 返回 die-away