短语词组短語degraded chernozem [土壤]退化黑鈣土;變質黑土;變質黑鈣土degraded ecosystem 生態系統degraded mountains 殘餘山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