核心畫面
You can picture investigation as a careful, official looking-into: something has gone wrong or is unclear — a crime, an accident, a problem — and someone steps in to dig under the surface, collect facts, and pin down what really happened. It is not a casual glance but a deliberate, organised search for the truth.
可以想成一場「有人正式、仔細地往裡頭挖」的過程：出了狀況——一樁犯罪、一場意外、一個說不清的問題——於是有人介入，翻…更多收起
可以想成一場「有人正式、仔細地往裡頭挖」的過程：出了狀況——一樁犯罪、一場意外、一個說不清的問題——於是有人介入，翻開表面、蒐集事證、把真相一點一點查出來。它不是隨便看看，而是有組織、有目的地追查到底。原始詞典資料1 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
investigationnoun/ɪnˌvɛs.tɪˈɡeɪ.ʃən/
- 1
The act of investigating; the process of inquiring into or following up; research, especially patient or thorough inquiry or examination
- The investigation into the crime has led to various leads as well as plenty of dead ends.
- Despite thorough investigation, the perpetrator of the attacks remains unknown.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。