daddy-poppy's 藥學跟動物世界

👮　資深

old （adj） 　老朋友、(敵人)有宿怨、(對手)長期競爭 　An old friend , enemy , or rival is someone who has been your friend, enemy, or rival for a long time
I called my old friend John
The French and English are old rivals

old colleague　 認識很久的同事

regular customers = regulars 　老主顧　The regulars at a place or in a team are the people who often go to the place or are often in the team
Regulars are the lifeblood of any restaurant business

repeat customer　老主顧（行銷用語）

✔　lifeblood　命脈

senior（adj）　資深的　The senior people in an organization or profession have the highest and most important jobs

➢　senior staff 　老員工

seniors （n）　 高年級生 　Seniors are students in a high school, university, or college who are the oldest and who have reached an advanced level in their studies

⏰  years my senior　 大⏰屆的學長姐
Mike was two years my senior at Yale

⏰ years my junior 　小⏰屆的學弟妹

veteran（n）［ˈvɛtərən］　老鳥　 a person who has had a lot of experience of a particular activity
He is a veteran of political campaigns

veteran　 老兵 　 someone who has served in the armed forces of their country, especially during a war

old hand （n） 　老手 　If someone is an old hand at something , they are very skilled at it because they have been doing it for a long time
I need an old hand to help me
She's an old hand at dealing with the press

➢　old hand at something

experienced（adj）　 經驗豐富的 
He is an experienced actor

👮　資淺

rookie （n）     菜鳥（特別指軍階或是警階）  rookie is someone who has just started doing a job and does not have much experience, especially someone who has just joined the army or police force
I don't want to have another rookie to train

novice（n）［ˈnɑvɪs］　 初學者   A novice is someone who has been doing a job or other activity for only a short time and so is not experienced at it
I've never driven a car before，I'm a complete novice

green（adj）　  經驗不足的 　if you say that someone is green, you mean that they have had very little experience of life or a particular job
I’m green in this company