what exactly is it
教育的最终目的到底是什么?
What is the ultimate purpose of education?
我始终没弄明白停车位到底是什么。
I’ve never really understood what a parking space actually is.
那个咒语到底是什么？
What exactly is that spell?
— 天空之城 (1986)
天知道他们的命运到底是什么。
Heaven knows what their fate really is.
到底是什么？
What exactly is it?
— 寄生虫 (2019)
魔术师的目的到底是什么
What exactly is the magician's goal?
— 空之境界 第五章 矛盾螺旋 (2008)
那到底是什么
So what exactly is it?
— 幸福的拉扎罗 (2018)
希尔维亚你到底是什么人啊？
Sylvia, who are you, anyway?
— 甜蜜的生活 (1960)
你到底是什么？
What exactly are you?
— 攻壳机动队 (1995)
其实，我自己也不知道那些笔记到底是什么。
Actually, I don’t even know what those notes are.
我很确定他说的“忘了”，指的是图书馆笔记，不管那到底是什么。
I'm pretty sure what he said he'd “forgotten” was the library notes, whatever those are.
到底是什么一回事？
What on earth is going on?
— 星际旅行2：可汗怒吼 (1982)
那到底是什么？
计划到底是什么
What exactly is the plan?
你到底是什么
这…这些东西到底是什么
Wh-what are these things, anyway?
— 釜山行 (2016)