antibiotic acts as a growth promoter

pusu19811225

antibiotic is known as a growth promoter for it limits: 1st, some mocrobe activities in the small intestine; 2nd, production of some toxic metabolites;3rd, sometimes decrease inavaiablity of nutrients from feed for animals by microbes, 4th, the thickness of the wal of GIT(Gastrointesinal tract)

qiaoyongniu

wal = wall, mocrobe = microbe, 還有這段話似乎有些問題，比較費解

pusu19811225

這段話的基本意思是，抗生素作為生長促進劑，目前研究得比較清楚的是因為它可以限制或減少：1）小腸中某些微生物的活性；2）某些有毒代謝物的生成；3）養分利于率的降低；4）腸壁厚度