同样,缠绕四次也只能形成一种绳结,叫做八字结。
Similarly , there is only one four-crossing knot , the figure eight .
然后你可以打个结,如果够长的话就打八字结,因为之后比较好解。
If you have enough , tie in a figure-8 cos'it 's easier to untie later .