"终于"在英语中可以表示"finally"或者"at last"的意思。
"Finally"意思是"最后，终于"，常常用来表示等待已久或者比较费劲地完成了某件事情。例如：
I've been waiting for this moment for so long. Finally, it's here. (我等这一刻真是太久了。终于到了。)
She's been working on this project for months. Finally, it's finished. (她做这个项目已经有几个月了。终于完成了。)
"At last"的意思也是"最后，终于"，常常用来表示经过一段比较长的时间终于发生了某件事情。例如：
I've been waiting for this day for so long. At last, it's here. (我等这一天真是太久了。终于到了。)
She's been working on this project for months. At last, it's finished. (她做这个项目已经有几个月了。终于完成了。)
希望这些例句能帮助你理解"终于"在英语中的用法。