The stairway carpet is so frayed it threatens to unravel.铺在楼梯上的地毯磨损得很厉害，都快散了。What moves him is the desire to unravel the mysteries of nature.推动他们的还是解开自然之迷的愿望.There is still a good deal to unravel.还有不少问题要澄清....
All this, needless to say, had been culled second-hand from radio reports.不用说，所有这些都是从电台报道中采集来的二手材料。The second-hand version is a poor copy of the original.盗版版本是对原版的低劣复制。We just can't find enough good second-hand cars...