That's because the Ukrainians are interested in protecting their civilians, and the Russians are interested in taking a lot of territory without necessarily having to kill so many Ukrainians, that could cause problems for them internationally as well as domestically inside Russia.
Eso es porque a los ucranianos les interesa proteger a sus civiles, y a los rusos les interesa tomar extensiones de territorio sin tener que matar necesariamente a tantos ucranianos, lo cual podría causarles problemas a nivel internacional así como en el interior de Rusia.