英语语法分析

After vein injection in pigling for 40 hours, the pig begin to present the same symptom and necropsy as the natural case.

静脉接种仔猪，40小时左右发病，发病后引起与自然病例相同的临床症状及剖检变化。

The present invention provides a new type yeast zymolite for improving growth behaviors of pigling and its production method.

本发明提供的是一种改善仔猪生长性能的新型酵母酶解物及及生 产方法。