[ 复数 knapsacks ]
Knapsacks Problem 背包问题
Laptop Knapsacks 电脑包
trapdoor knapsacks 陷门背包
Sporting Bags incl Knapsacks 运动袋包括背囊
N-COUNT A knapsack is a cloth or leather bag that you carry on your back or over your shoulder, for example when you are walking in the countryside. 背包
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