As the saying goes: Hunger breeds, food can provide metabolicenergy, most competent people can be fit and healthy food.
俗语云：民以食为天，食物可以提供新陈代谢的能量，合时合人的食物更能强身健体。
2
The concentration of metabolicenergy in the diet was the main nutrient limitation, and the second one was quality of pasture;
影响绵羊采食量的主要营养因素是饲粮代谢能浓度，其次是牧草质量。
3
The results showed that crude protein level in the diet was the main nutrient limitation affecting liveweight gain of grazing sheep, and the dietary metabolicenergy level came second.