Language Point 15
... a surgical nurse's assistance during her first day on the medical team ... (Para. 4)
Meaning: ... a surgical nurse's help during her first day when she worked among other members of the medical team ...
assistance: n. help
With your assistance, I can finish the job in time.
有你的幫助,我能按時完成工作。
on: among (是)......的成員;供職于
on a team (是)一個隊的成員
I am on the committee considering new members for our club.
我是俱樂部委員會的委員,負責審查俱樂部新成員的資格。