There are alternative sources of nutrition to animal meat.
有能替代动物肉类的其他营养来源。
《柯林斯英汉双解大词典》
2
They allow the animal to rely on sunshine for its nutrition.
他们让动物靠阳光获取营养。
3
Food is any substance, usually composed primarily of carbohydrates, fats, water and/or proteins, that can be eaten or drunk by an animal for nutrition or pleasure.