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He heated the metal and drew it out into a long wire.
他把金属烧热，并将它拉成一条长线。
《新英汉大辞典》
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A fine wire heated electrically to incandescence in an electric lamp.
白炽电灯的关键部分是灯泡里的钨丝。
youdao
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A fine wire heated electrically to incandescence in an electric lamp.
白炽电灯的关键部分是灯泡里的钨丝。
youdao