I'll need to buy a large, strong, light backpack to carry my supplies of food and water.

我得买一个又大又牢而且很轻的旅行背包来装我的食物和饮用水。

youdao

I will need to buy a large backpack to carry my supplies of food and water.

我需要买一个大的旅行背包来背负我的食物和水。

youdao

The player can sell unused items to the vendor NPCs to free up space in the backpack and to earn the gold required to buy the items offered by the various vendors.

玩家可以出售闲置物品供应商NPC自由的空间，在背包和赚取要求购买由不同的供应商提供的项目金。

youdao

So I think I'm going to buy a new backpack.

所以我在考虑换一个新的双肩包。

I need 实战 - SpeakingMax英语口语达人

But so inept was Hassoun, he bought a backpack, walkie-talkies and some batteries agents asked him to buy and the FBI then incorporated it into the dud bomb fashioned at its lab in Quantico, Va.

NPR: Would-Be Chicago Backpack Bomber Gets 23 Years