We're involved in anti-nuclear activity, conservation and protection of animals and protection and support of our eco-system.
我们参与反核活动，保护动物，以及维持和保护我们的生态系统。
2
Because of the importance of nutrients and their scarcity, nutrient recycling is one of the most significant eco-system processes that we'll cover in this course.
由于养分的重要性和贫乏性，营养循环是我们在这门课中会讲到的最重要的生态系统过程之一。
3
Plenty of experiments, albeit accidental ones, have already demonstrated that subtracting even one species can change an eco-system.