/ˈoʊpənɪŋ ˈwɪtnəs/ – Phrase
Definition: nhân chứng khai đầu tiên.
A more thorough explanation: An opening witness is a witness called by a party at the beginning of a trial or hearing to provide testimony and evidence in support of that party’s case.
Example: In the case of Smith v. Jones, the opening witness testified about the events leading up to the accident.