/ɪnˈfɔːrməl ˈrɛkərd/ – Phrase
Definition: những ghi chép không chính thức.
A more throughout explanation: An informal record refers to a document or piece of information that is not created or maintained in the regular course of business or official proceedings. It is typically not considered an official or formal record and may not have the same level of reliability or authenticity as formal records.
Example: An informal record of the meeting was kept by the secretary for reference purposes.