kṛtam — Satya-yuga tretā — Tretā-yuga dvāparam — Dvāpara-yuga ca — and kaliḥ — Kali-yuga ca — and iti — thus catuḥ-yugam — the cycle of four ages anena — by this krama — sequential yogena — pattern bhuvi — in this world prāṇiṣu — among living beings vartate — goes on continuously.