/ˈbækpæk ||; ˈbækpæk/noun [C] a large bag, often on a metal frame, that you carry on your back when travelling 背包 [SYN] rucksack 同义词为 rucksack☞picture at bag 见 bag 插图
backpack²
/ˈbækpæk ||; ˈbækpæk/verb [I] to go walking or travelling with your clothes, etc in a backpack 背着背包旅行 Go backpacking is used when you are talking about spending time backpacking We went backpacking round Europe last summer.go backpacking 的意思是背着背包去旅行：We went backpacking round Europe last summer. 去年夏天我们背着背包周游欧洲。 ➔backpackernoun [C]