全球气温可能会回到工业化前的水平，但风险是两极的温度仍将高于正常水平，而热带地区的温度将比工业化前的要低。
You may bring global temperatures back to pre-industrial levels, but the risk is that the poles will still be warmer than they should be and the tropics will be cooler than before industrialisation.
与生活在凉爽气候里的物种相比，热带物种所能承受的温度范围其实很小。
Compared to those in cooler climates, tropical species can cope with only a narrow temperature range.
这个结论反驳了所谓的“恒温器”假说——预测当世界其他地区升温的同时热带温度将保持不变。
This counters the so-called 'thermostat' hypothesis, which predicts that tropical temperatures would stay fairly stable even as other parts of the world heated up.
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