detective work
US /dɪˈtek.tɪv wɜːrk/
UK /dɪˈtek.tɪv wɜːrk/

1.
侦探工作, 调查工作
the work of a detective; investigation, especially to solve a crime or mystery
:
•
It took a lot of detective work to figure out who stole the cookies.
找出是谁偷了饼干需要大量的侦探工作。
•
Her job involves a lot of detective work, piecing together clues from various sources.
她的工作涉及大量的侦探工作,将来自各种来源的线索拼凑起来。