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(不可數)
- (無機化學) 二氧化碳
- 2008 12月 9, , “Skepticism on climate change [對氣候變化的懷疑]”, 出自 The International Herald Tribune, →ISSN:
- There were dozens of presentations in 2008, including: […] "The Overstated Role of Carbon Dioxide on Climate Change."
- 2008年有数十场演讲,其中包括: […] “二氧化碳对气候变化的夸大性作用”。
- 2013 September–October, Katie L. Burke, “In the News”, 出自 ,於2013-09-03歸檔自原頁面:
- Oxygen levels on Earth skyrocketed 2.4 billion years ago, when cyanobacteria evolved photosynthesis: the ability to convert water and carbon dioxide into carbohydrates and waste oxygen using solar energy.
- 24亿年前,当蓝藻进化出光合作用时,地球上的氧气含量猛增:利用太阳能将水和二氧化碳转化为碳水化合物并消耗氧气的能力。
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