Due to the bond angle of the sugar-phosphate molecules, the linkages will eventually form a double helix structure.

由于糖-磷酸分子的键角，最终形成双螺旋结构。

But those tight bond angles of that triangular cyclopropane make it very fragile.

但是那个三角形环丙烷的紧密键角使它非常脆弱。