old-timer

那位老员工是公司里的元老，已经在这里工作了三十年。

That ___old-timer has been working at the company for thirty years.

作为这家公司的元老，他深知所有的工作流程。

As an ___old-timer in this company, he knows all the work procedures well.

这位老居民还记得镇上第一家电影院开业时的盛况。

The ___old-timer still remembers the grand opening of the town's first cinema.