"Pass the backpack" is a common way to ask someone to hand over a backpack in Engpsh.

The phrase "pass" in this context means to give or hand something to someone else, often by tossing it to them or handing it to them directly. "The backpack" refers to the specific backpack being discussed.

Here are a few example sentences using this phrase:

"Can you pass the backpack to me, please?" (你能把书包给我吗，请？)
"I need to grab something out of the backpack. Can you pass it to me?" (我需要从书包里拿出一些东西。你能把它给我吗？)
"I'll pass the backpack to you, and then you can pass it to John." (我会把书包给你，然后你再把它给约翰。)