at the latest, no later than
最迟明天就会到这里
It’ll be here by tomorrow at the latest.
— 黄金三镖客 (1966)
我们会在黎明后抵达；只要所有帆都升起来，风也够好，我们最迟日落时就能驶出海峡。
We’ll arrive after dawn; as long as all the sails are up and the wind is favorable, we’ll be through the strait by sunset at the latest.
注意，你们最迟要在五点钟之前到这儿。
Attention, you must get here by five o’clock at the latest.
最迟星期一就回来
I'll be back by Monday at the latest.
— 双重赔偿 (1944)