I twisted three ropes together into one, so it was like thick cord.

我把三根绳子拧成一根，这样它就像粗绳。

And if it-- and you see them all jump on the rope together.

如果是的话——你会看到他们一起跳上绳子。

Mountaineers rope themselves together for safety.

【rope】登山者为了安全用绳子把彼此连在一起。

While Dogsbreath pushed Fishlegs down to join Hiccup in the snow, everybody started roping themselves together.

当狗呼吸把鱼腿推到雪地里加入卡嗝的时候，每个人都开始用绳子把自己绑在一起。