Definition
Used to express surprise, anger, or frustration, often as an intensifier in questions or exclamations.
（用於加強語氣）究竟、到底。
In God's name, what are you even talking about?
看在上帝的份上，你到底在說什麼？
Why in heaven's name would you do such a thing here?
到底為什麼你會在這裡做這種事？
I don't understand, what in God's name were they thinking?
我不明白，他們到底在想什麼？