✔ 最佳答案
There is a slight difference in usage:
Finally - to signify an end over a period eg We have walked a long way to finally get here.
(you will not use Lastly here).
Lastly - ususally if you are speaking of several items, and coming to the last one eg (in a presentation) Lastly, I would like to show you how this is done. If you use finally, it implies "wow, finally we are getting to the end of the presentation - I have already sat here for 3 hours........)