单词	double helix
释义	double helix From Longman Dictionary of Contemporary EnglishRelated topics: Shapes, patterns, Microbes, genetics, biochemldoce_073_adouble helixˌdouble ˈhelix noun [countable] technical  CFHBMa shape consisting of two parallel spirals that twist around the same centre, found especially in the structure of DNAExamples from the Corpusdouble helix• Each then acts as a template to which other simpler molecules become attached until each has once more become a double helix.• The entwined serpents forming a double helix gave birth to the Caduceus.• Cobras are constantly depicted entwined in a double helix.• If the ends of such non-dividing clone are held while it grows, then unexpectedly a double helix appears.• Thus each double helix becomes two double helices, with the two new doublets remaining joined at the centromere.• In the formation of the double helix, a total of 12 rotors are restricted per base pair stack.• These conformations influence the position of the phosphate group with respect to the grooves of the double helix.
随便看	owe a debt of gratitude owe a drink etc owe a letter etc owe a lot a great deal owe a owe a great deal owe allegiance etc to owe an apology owe an explanation owe for owe for owe it all to everything to owe it all to owe everything to owe it all to somebody/owe everything to somebody owe it to somebody to do something owe it to to do owe it to yourself to do owe it to yourself to do something owe loyalty etc to owe loyalty/allegiance etc to somebody owe money etc owe somebody owe somebody a debt (of gratitude) owe somebody a drink/letter etc owe somebody a lot/owe somebody a great deal owe somebody an explanation/apology

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