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double helix

noun
🔊/ˌdʌbl ˈhiːlɪks/
🔊/ˌdʌbl ˈhiːlɪks/
(biology生物)
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  1. the structure of DNA, consisting of two connected long thin pieces that form a spiral shape双螺旋（脱氧核糖核酸的结构）