Conclusion The articular surface of costal head is divided into single form and double form. Double form is prone to appear in 3 to 10 costal ribs with more morphological variations;

结论肋头关节面多分为单、双两种形态，其中第3～10肋双关节面出现率更高，且形态变异较大，可能是双关节面更易出现肋头关节劳损与错位的重要原因。

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Those are two continuous strands that wind around each other to form the double helix.

这两股主链,相互缠绕形成双螺旋

耶鲁公开课 - 生物医学工程探索课程节选

They would naturally hybridize and form a duplex, or a double stranded nucleic acid.

它们会自然杂交并形成双螺旋,或者说双链核酸

耶鲁公开课 - 生物医学工程探索课程节选

This is - what this diagram shows you is-- the forces that hold these individual strands of DNA into a double stranded form.

你们可以看看这个图表,演示了连接两条DNA长链为双螺旋,结构的化学力

耶鲁公开课 - 生物医学工程探索课程节选

It takes the double form of a conflict between religions and a conflict between nationalisms.

ECONOMIST: Hope in a hate-infected city

Many times new issues will run higher in the first few days after the IPO to only pullback a couple of times to form a double bottom.

FORBES: Watching AONE For A Bottom

Chart Analysis : The Market Vectors Semiconductor ETF ( SMH) appeared to form a double bottom in July (line a), which set up a good short-term trade.

FORBES: Chip Makers Not Seasoned Yet