你必须经历一个非常漫长的过程才能通过那个能恢复到清水状态的生态系统的临界点。
You have to go quite a long way past that point to bring back the clear-water ecosystem.
我们越来越确信，世界海洋生态系统正在接近临界点。
We are becoming increasingly certain that the world's Marine ecosystems are approaching tipping points.
地球的许多生态系统正在接近关键临界点。
Many of the Earth's ecosystems are nearing critical tipping points.
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