what in Cain

• 到底 ...
• 究竟 ...

what in Cain的用法和样例：

例句

1. I can't make out what he is driving at.
   我弄不懂他到底是什么意思。
2. Time will show which of us is in the right.
   我俩到底谁是谁非，日久自明。

1. He now began to inkle what was going on.
   他现在开始有点明白究竟在发生什么事了。
2. We all want to know what actually happened.
   我们都想知道个究竟。