It doesn't matter if this or that cigarette is the last one, as long as one of them is.

哪支香烟是最后一支无关紧要，只要有一支是最后一支就可以了。

youdao

She carried nothing in her hands, no purse, no personal possessions of any kind, but when Arty opened the door she raised her hand and dimmed her eye, taking one last drag from a cigarette before extinguishing it under her bright silver heel.

NEWYORKER: The Valetudinarian