has been driven by certain fundamental principles. 都受到某些基本原则的驱动
has not just been a matter of chance. 并非仅是偶然
Throughout history, life has been waging an unending war. 在历史的长河中 生命一直在进行无尽的战争
In south Korea, the forests have been devastated by war. 在韩国 森林曾被战争损毁
Never has learning been given to so many human beings. 从来没有过这么多人可以接受教育
Others pay the price without having been actively involved. 其他没有参与的生物也要付出代价
The elements on which it relies have been disrupted. 其依赖的成分也已被破坏
The system that controls our climate has been severely disrupted. 控制着气候的系统已经被严重破坏
In these polar regions, the balance of nature has already been disrupted. 在两极地区 自然平衡已经被破坏了
Hasn't been so high for several hundred thousand years. 二氧化碳浓度从来没有如此之高