English Dictionary

backpack

/ˈbæk.pæk/

noun

A knapsack, sometimes mounted on a light frame, but always supported by straps, worn on a person’s back for the purpose of carrying things, especially when hiking, or on a student's back when carrying books.

I always carry my backpack when I go hiking.

意味（1）

A knapsack, sometimes mounted on a light frame, but always supported by straps, worn on a person’s back for the purpose of carrying things, especially when hiking, or on a student's back when carrying books.

Rachel discovered that she could also keep things in her backpack that were important to her, nobody would know about them because they would be hidden. These important things included a small round rock that she had found […]

意味（2）

A similarly placed item containing a parachute or other life-support equipment.