“珊瑚礁生态系统处于困境，”戈尔说。
我们已经为珊瑚礁生态系统设定了安全门槛。
We've already passed a safe threshold for coral reef ecosystems in terms of climate change.
珊瑚礁生态系统初级生产力研究较多，但新生产力却很少。
There have been extensive studies on primary production of coral reef ecosystems, but much less on new production.
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