A fat, most often of animal origin, whose fatty acid chains cannot incorporate additional hydrogen atoms. An excess of these fats in the diet is thought to raise the cholesterol level in the bloodstream.饱和脂肪：一种脂肪，最常见于动物身上，它的脂肪酸链不能容纳多余的氢原子。食物中含有过多这种脂肪被认为会提高血液中的胆固醇含量