tau-both; imau-these; vai-certainly; bhagavatah-of the Supreme Personality of Godhead; hareh-of Hari; amsau-part and parcel expansion; iha-here (in this universe); agatau-has appeared; bhara-vyayaya-for mitigation of the burden; ca-and; bhuvah-of the world; krsnau-the two Krsnas (Krsna and Arjuna); yadu-kuru-udvahau-who are the best of the Yadu and Kuru dynasties respectively.