短語詞組短語degraded chernozem [土壤]退化黑鈣土;變質(zhì)黑土;變質(zhì)黑鈣土degraded ecosystem 生態(tài)系統(tǒng)degraded mountains 殘余山degraded band 遞降譜帶;遞降的degraded color 遞減色;遞降色degraded signal 惡化信號;惡化的信號degraded solonetz 退化堿土 返回 degraded