Complex sentence: During grazing, the silica content in forage causes abrasion of teeth, this is compensated by a continuous growth of teeth throughout their life, as opposed to humans or other non-ruminants whose teeth stop growing after a particular age.
Split into simpler sentences: During grazing, the silica content in forage causes abrasion of teeth. Abrasion of the teeth is compensated by continuous tooth growth throughout the ruminant's life, as opposed to humans or other non-ruminants whose teeth stop growing after a particular age.