侵入自然环境系统的有害物质数量过大，超过了自然环境系统的调节功能而导致自然环境破坏的现象environmental degradation

• 中国在高增长的同时也付出了资源损失和环境退化的沉重代价。

  While enjoying high levels of growth, China has paid the heavy price of resource loss and environmental degradation.