[化] 三股螺旋

triple helix的用法和样例：

例句

The CD spectra showed that the addition of glycerol to the collagen did not damage the native triple helical structure of collagen.圆二色谱表明，甘油的加入没有改变胶原天然的三股螺旋结构。
For two complementary strands of nucleotides, the free energy is minimized when they pair up to form a double helix.就两股互补的核苷酸分子而言，配对形成一条双股螺旋时的自由能会最低。

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