Note: The only place you need to do a double knot is at the start and finish of the paper block.
备注：在开头和结尾的地方，必须打两个结。
Parents are declaring their kid a genius because she learned to tie a double knot without being taught or received five more star stickers than any other student in second grade.
家长容易大惊小怪，只要孩子自己学会打结，或者比其他小朋友多拿了几颗星就大赞自己的孩子是天才。
Most shoelaces on running shoes are extra long, so be safe and double-knot them.
多数跑鞋的鞋带很长，所以要系好，要系双扣。
Most shoelaces on running shoes are extra long, so be safe and double-knot them.
多数跑鞋的鞋带很长，所以要系好，要系双扣。
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