使纠缠,变得错综复杂( ravel的现在分词 );磨损;
The rope is ravelling at its end.
绳子在一端开了.
Traveling Salesman Problem, or TSP problem ( Travelling Salesman Problem ) is a well-known field of mathematics problems.
旅行商问题, 即TSP问题 ( TravellingSalesmanProblem ) 是数学领域中著名问题之一.
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