As a kind of active substance, the exogenous nucleotides can affect the function of stomach and intestines, the development of hepar, the metabolism of lipid and the immune system of creature.
介绍了外源核苷酸作为一种活性物质，对胃肠道的功能、肝脏生长与发育、脂质代谢、动物体免疫系统等具有重要影响。
The influence of exogenous ground substance affected on NRA increased with the decline of amount of nitrogen applied.
外源基质对NR活性的影响随施氮量提高而下降。
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