/ˈæmˌbæsədər ˌæt ˈlɑrdʒ/ – Pharse
Definition: nhà ngoại giao hàm đại sứ, đặc phái viên.
A more thorough explanation: An “ambassador at large” is a diplomatic official who is appointed to represent a country on a specific issue or in a specific region, rather than being assigned to a particular country. This individual is typically given a broad mandate to engage with various governments, organizations, and individuals in order to promote the interests of their country in the designated area of responsibility.
Example: The President appointed John Doe as the ambassador at large to oversee diplomatic relations with multiple countries.