他说，大气中的二氧化碳造成气候变暖，这种程度已经超出了珊瑚的承受极限，而在这种条件下，珊瑚漂浮已普遍发生。

The carbon dioxide that's already in the atmosphere is enough to cause ocean warming beyond the point at which coral bleaching becomes common, he said.

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这项研究表明，只要这个未知极限水平一直不为人类所知，随着二氧化碳含量的增加，总有一天大气中的二氧化碳含量水平达会到这个极限，从而引发象上新世时期的气候。

While that level remains unknown, this research indicates that by increasing carbon dioxide levels, humans could reach the threshold that would induce a Pliocene-like climate.

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当尼古丁、焦油量、一氧化碳值吸附达到极限时，产品颜色自然变化为暗黄色；

When saturated with tar, nicotine or carbon monoxide, the product will turn dark yellow.

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