Complex sentence: A hypersaline lake is a landlocked body of water, that contains significant concentrations of sodium chloride or other mineral salts, with saline levels surpassing that of ocean water (3.5%, i.e.35 grams/liter).
Split into simpler sentences: A hypersaline lake is a landlocked body of water, that contains significant concentrations of sodium chloride or other mineral salts. In such lakes, typical saline levels surpass that of ocean water (3.5%, i.e.35 grams/liter).