单词	退化生态系
释义	退化生态系degraded ecosystem
随便看	helicopter; coaxial type helicopter; composite helicopter; compound helicopter control ship helicopter control ship {= hcs} helicopter-- convertible helicopter; convertible helicopter-- crane helicopter; crane helicopter crew escape helicopter deck helicopter direction center helicopter direction center {= hdc} helicopter director helicopter drop point helicopter duster helicoptered helicopter electromagnetics helicopter emitter/locator countermeasure helicopter emitter/locator countermeasure (hemloc) helicopter energy/rotor management system helicopter energy/rotor management system (hermes) helicopter; fire support helicopter gravity helicopter gunship