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发帖数: 2031 | 1 en.wikipedia.org/wiki/Backpack
A backpack (also called rucksack, knapsack, packsack, pack, or Bergen) is,
in its simplest form, a cloth sack carried on one's back and secured with
two straps that go over the shoulders, but there can be exceptions. Light
weight types of backpacks are sometimes worn on only one shoulder strap. |
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