逃生结，每个人都得学起来。特别安全牢固，关键时刻一定用得上

The python knot is known as one of the most dangerous knots in the world - it is almost impossib

家庭园艺必备的多用途捆绑技巧，超级稳固

If the rope ends are butted like this, knotting the rope ten times will not create a practical k

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