nutritious substance meaning in English

营养品
营养物质

This is one of the most common harmful effects that parasites have on their hosts . for example , roundworms and pork tapeworms live in the intestines and rob the body of nutritious substances in the intestines , thus causing malnutrition . 2 mechanical action : parasites can endanger the host through obstruction , compression and direct damage
1夺取营养：寄生虫摄食宿主的营养物质，供其发育繁殖和生存，这是寄生虫对宿主造成最常见的危害之一，如蛔虫和猪肉绦虫寄生在小肠内，夺取肠道内的营养物质，可引起营养不良。