old-timer

n.

老资格的人；老前辈；老人；旧式的人

复数：old-timers

1. He is one of the old timers here in the office.
   他在这个办公室里是老前辈之一。
2. That's why the Old Man, the Maestro Segovia, does not accept anything hanging in the stage where he plays concerts, unless sometime he will play the concert and record it.
   那也是这位老前辈，赛歌维亚大师，不喜欢演奏会的时候，舞台前面挂着一些东西，除非是现场演奏的录音。
3. The old man was on the verge of eighty.
   那老人已年近八十。
4. The old man managed to puff out a few words.
   那老人好容易喘着气说出几句话。

Impetuous Youngsters and Jaded Old-Timers: Acquiring a Reputation for Learning
Newcomers and oldtimers in small groups.
Socialization Amidst Diversity: The impact of demographics on work team oldtimers and newcomes
Classification: Oldtimers and newcomers
Classification: Oldtimers and newcomers (p 463-475)
Newcomers and Oldtimers: Growth and Change in a Mountain Town.
Vascular biology. Old-timer makes a comeback
Jaber F. Gubrium. Oldtimers and Alzheimer's: The Descriptive Organization of Senility.
Group-directed criticisms and recommendations for change: why newcomers arouse more resistance than old-timers.
Environmental and Human Impact of an Old-Timer Incinerator in Terms of Dioxin and PCB Level:  A Case Study