an old hand
US /ən oʊld hænd/
UK /ən əʊld hænd/
成语
老手, 经验丰富的人
a person with a lot of experience in a particular area or activity
示例:
•
She's an old hand at negotiating contracts, so we trust her judgment.
她是谈判合同的老手，所以我们相信她的判断。
•
Don't worry, he's an old hand at this kind of work.
别担心，他做这种工作是老手了。