lastly和at last有什么區別

　　例句：

　　1、Lastly, I would like to ask about your future plans...

　　最后，我想問一下你未來的計劃。

　　2、They wash their hands, arms and faces, and lastly, they wash their feet.

　　他們洗了手、胳膊和臉，最后腳也洗了。

　　3、Lastly, I would like to thank my parents for all their support.

　　最后一點，我想感謝父母對我的全力支持。