I need to pick up a few things.

我想买点东西。

What do you need to buy?

你要买什么？

I'll get a shopping cart so we don"t have to carry everything.

我去拿个购物车，这样就不用什么都拿在手上了。

*shopping cart意思是"购物车"

Is this on sale？

这个在打折吗？

*on sale就是"打折"

Are you in line？

你在这儿排队吗?

*in line表示"排队"

I need some ground beef/pork.

我要一些碎牛肉/猪肉

*其中ground beef表示"搅碎的牛肉"或者我们可以说minced beef

The onions and tomatoes are in the produce section.

洋葱和西红柿在农产品区。

*这里的produce section的意思就是"农产品区"。

What do you need from the meat section?

你要从肉产品区买点什么肉？

*meat section意思是"肉产品区"

I wanna take some frozen dumplings from the frozen-food case.

我想从冷藏柜拿一些速冻饺子。

*frozen-food case就是冷柜

Where is the checkout counter？

结账处/收银台在哪儿?

*checkout counter就是收银台