natural service

• 自然交配,本交

natural service的用法和样例：

例句

1. Former chicken of black blood chicken plants forest is by pure Hei Yu pheasant and the distinctive chicken that form after grouse is natural and copulatory are planted.
   丛林黑血鸡原鸡种是由纯黑羽山鸡与野鸡自然交配后形成的独特鸡种。