oxygen
B2英 /ˈɒksɪdʒən/美 /ˈɑːksɪdʒən/
释义
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.
“The patient didn't seem to be getting enough oxygen.”
真实视频例句
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“and it's primarily oxygen, roughly 77-78 percent oxygen by weight.”
推进剂中主要是氧， 氧的重量大概占到77%-78%，
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