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单词
acetylene
释义
a.ce.ty.lene
HE5set7E7li:n, $-5set-
n [U]
a colourless gas which burns with a very hot bright flame, used in cutting and joining metal
(化学) 乙炔,电石气
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USN
USS
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usual
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更新时间:2025/6/24 7:09:48