Global warming is caused by holes in the ozone layer and the steady buildup of carbon.
全球变暖是由臭氧层破洞和不断积累的二氧化碳造成的。
One is the long-term buildup of carbon dioxide, which can remain in the atmosphere for centuries.
一个是二氧化碳的长期积累，它留在大气层达几个世纪。
The buildup of carbon dioxide causes blood vessels in the brain to dilate, resulting in headaches.
二氧化碳的累积造成脑部血管扩张，导致头痛。
The buildup of carbon dioxide causes blood vessels in the brain to dilate, resulting in headaches.
二氧化碳的累积造成脑部血管扩张，导致头痛。
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