knapsack

FREQ #33338

n. 背包

发音

US /ˈnæpsæk/

词形变化

knapsacks 复数 knapsacks knapsacked knapsacking knapsacks 三单 knapsacking 现在分词 knapsacked 过去式 knapsacked 过去分词

别名

nap sack napsack

释义与例句

n.
  1. 1.

    A case of canvas or leather, for carrying items on the back.

    美国 古体

    1936, Arthur Ransome, Pigeon Post, ch 3. "All but Nancy carried knapsacks, with sandwiches and thermos flasks of tea. Peggy’s knapsack held Nancy’s provisions as well as her own, for on Nancy’s shoulders, instead of a knapsack, was a pigeon-basket […]"

  2. 2.

    A set of values from which a subset is chosen.

    计算机 工程 数学
v.
  1. 1.

    To go hiking while burdened with a knapsack, usually overnight or for longer.

    My sleeping bag fell off my backpack into the water, while we were knapsacking up the mountain.

词汇关系

名词

同义词 4

backpack rucksack haversack packsack

上位词 1

bag

下位词 1

kitbag

相关短语

knapsack problem [计] 背包问题, 渐缩问题 knapsack problems

词源

From Low German knapzak or Dutch knapzak (older form cnapsack), from Middle Dutch cnappen (“to bite with teeth”), ultimately from knappen (“to eat, crack”), of imitative origin, + sack. German Knappsack is from Dutch.

来源：wiktionary