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氧气 一种气态化学元素，在细胞呼吸和燃烧过程中最基本的和最丰富的元素，在地壳中占20%的空气量。 yǎngqì
environ.	ossigeno m

氧气: 5 phrases in 3 subjects

Environment	3
Thermal Energy	1
Welding	1