在畜牧场,氨是由生物降解形成的.In stock yards ammonia is formed by biological degradation.这个畜牧场在饲养干农活的高头大马.The stock farm is raising big horses for work in the fields.那是畜牧场.That is a cattle farm....

“畜牧场”的英语可以翻译为：stock farm ...