knapsack

/ˈnæp.sæk/

名词

（徒步旅行者或登山者用的帆布或皮制的）小背包
As the hiker set out on the trail, they adjusted the straps of their knapsack filled with water, snacks, and a map.
当徒步者踏上小径时，他们调整了背包上装满水、零食和地图的带子。