未鉴定生长因子提高增重不是由于蛋白质存留率提高。
The increasing weight gain by UGF surces is not caused by the increment of protein retention rate.
低蛋白组大鼠锌吸收率与存留率显著降低，提高蛋白质摄入水平可明显改善锌的吸收与存留；
The zinc absorption and retention of rats fed the lowest protein level were decreased significantly, and were improved clearly by increasing protein intake level.
低蛋白组大鼠锌吸收率与存留率显著降低，提高蛋白质摄入水平可明显改善锌的吸收与存留；
The zinc absorption and retention of rats fed the lowest protein level were decreased significantly, and were improved clearly by increasing protein intake level.
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