The crash had spilled a noxious defoliant into the planet's ecology, ravaging the native flora.这次坠毁将一种有害的落叶剂洒入星球的生态系统中, 破坏着当地的植物群....a senior lecturer in ecology.生态学高级讲师To keep ecology in balance is our duty.保持生态平衡是...
To keep ecology in balance is our duty.保持生态平衡是我们的职责.Development has been guided by a concern for the ecology of the area.该地区的发展以注重生态为指导原则。We are reproducing ourselves at such a rate that our numbers threaten the ecology ...