At last vs. Last but not least

At last 同 Last but not least 有好大分別架。At Last 解作 [終於]。 Last but not least 個 [last] 解作 [最後，按照排列次序]，而 [but not least] 係客氣說話，話雖然係排尾，但係同樣重要]。
At last 同 Last but not least 兩個都可以解 finally (最後)，所以有時會混亂。不過 At Last 嗰個 finally, 係解等咗一段時間嘅 [最後]，即係 [終於] 嘅意思。 Last but not least 嗰個 finally, 係解排列响最尾嘅 [最後]。例子：
At last, the train came, two hours behind schedule. 架火車終於來咗 ，遲咗两個鐘。 參考：http://idioms.thefreedictionary.com/at+last
"Last but not least, Mary will now perform a modern dance for us" 最後，但係一樣咁精彩嘅，係瑪莉為我地表演現代舞。參考：http://idioms.thefreedictionary.com/last+but+not+least

Last But Not Least

都係作文,用喺結論前一段,即係內文嘅最後1點.唯一唔同係at last係最後咁解,而last but not least係最後但唔係最唔重要咁解,所以呢句係正式(公函/論文)d,而at last係正唔正經都得.

at last 係"最後"，last but not least 係"實際上唔止咁少"。