first， second是序数词，finally是副词。
The iraq revolt was finally crushed .伊拉克的背叛终于被压制下去了。
We finally succeeded in making the plan .我们终于把计划制定出来了。
They finally managed to talk her round .他们最后终于设法说服了她。
It was ten o'clock when he finally showed up .十点钟时他终于出现了。
He came finally upon a miserable slum .后来，他闯进一个穷苦的贫民窟。
