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 .
八字结八字结八字结