We don't see all the internal loops and variables, we just see the result come back as if by magic… .
我们看不到所有的内部循环和变量,我们只看到结果像变魔术一样返回… … 。
英语百科
Internal loop
Internal-loops (also termed interior loops) in RNA are found where the double stranded RNA separates due to no Watson-Crick base pairing between the nucleotides. Internal-loops differ from Stem-loops as they occur in middle of a stretch of double stranded RNA. The non-canonicoal residues result in the double helix becoming distorted due to unwinding, unstacking and kinking.