"International communication" emphasizes the transmission and exchange of information across different countries, nationalities, languages and cultural backgrounds. This can be any form of communication, including oral communication, written communication, virtual network interaction and so on. It usually involves transmitting information more systematically, not just interpersonal communication.
"International communication" focuses on the interaction and communication between different countries, nationalities and backgrounds, so as to promote cooperation in the fields of culture, commerce, science and technology and education. This kind of communication can be two-way: for example, in academic and technical fields, and it can be a one-way cultural output: for example, education, music, movies and entertainment.
In short, in international communication and interaction, "international communication" and "international communication" are two popular expressions, which embody different categories and levels, but together remind us that we must strive to overcome various obstacles and communication problems and promote the development of human civilization.