你们到底

what exactly are you (all) ...

→ 你们
phrase Uncommon #9,203
what exactly are you (all) ... 到底 adds emphasis to a question and can suggest impatience or a demand for a clear answer.
CH: 你们到底想吃什么?
EN: What exactly do you guys want to eat?

你们到底有多熟啊

Just how well do you two know each other?

— 几近成名 (2000)

你们到底懂不懂啊

Do you guys even understand?

— 功夫 (2004)

你们到底熟不熟啊?

Are you guys actually close or not?

— 后来的我们 (2018)

小伙子们…我不知道你们到底在玩什么游戏.

Guys… I have no idea what game you’re playing.

— 趣味游戏 (1997)

不想你们到底有什么关系?

I don't want to. What exactly is the relationship between you two?

— 印度有嘻哈 (2019)

你们到底是干什么的啊

What exactly do you guys do?

— 看见恶魔 (2010)

你们到底说什么呢?

What on earth are you talking about?

— 怒火青春 (1995)

你们到底对我做了什么?

What on earth did you do to me?

哦,你们到底谈了些什么?

Oh, what on earth did you talk about?

— 攻壳机动队 (1995)

你们到底谁啊

Who are you guys, anyway?

— 唐人街探案 (2015)

你们到底想干什么?

What exactly are you trying to do?

— 烈日灼人 (1994)

你们到底有多少人啊

How many of you are there, anyway?

— 钛 (2021)

你们到底走不走啊

Are you guys leaving or not?

— 唐人街探案 (2015)