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英语单词
oxygen
B2英 /ˈɒksɪdʒən/美 /ˈɑːksɪdʒən/
noun
氧气
a chemical element. Oxygen is a gas that is present in air and water and is necessary for people, animals and plants to live.
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It uses methane as fuel, and it's primarily oxygen—roughly 77–78 percent oxygen by weight.
它使用甲烷作为燃料，且主要由氧气组成——按重量计算约占77%至78%。
Elon Musk: A future worth getting excited about (TED 2022)
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