• 法国拉斯科洞穴发现冰河时代晚期绳索条绳索转的纤维捆成因此子编成的。

    The late Ice Age rope found in the French cave of Lascaux consists of fibers spiraling to the right, and was therefore tressed by a righthander.

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  • 比较两组1个月随访颈椎屈、、左旋、右旋5个方向的活动度变化值均有统计学意义(P<0.05)。

    Compared between groups, cervical anteflexion, left and right lateral bending, left and right rotative activity showed significant difference at the 1 month after treatment(P<0.05).

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  • 烯类化合物的旋光性也遵循螺旋右旋螺旋左旋的螺旋规律

    The optivity of annulene compounds abided by the helix law, that is, right handed helix is D-rotatory and left ha…

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  • 烯类化合物的旋光性也遵循螺旋右旋螺旋左旋的螺旋规律

    The optivity of annulene compounds abided by the helix law, that is, right handed helix is D-rotatory and left ha…

    youdao

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