英语语法分析

For many years, Pasteur thought that pebrine was not a contagious disease.

多年来，巴斯德一直认为微粒子病不是一种传染性疾病。

At present, pebrine influence seriously on the egg-production of silkworm.

目前家蚕微粒子病对蚕种生产造成很大影响。

In order to guarantee the quality of silkworms eggs, multiple sampling plan is put forward about the sampling inspection of pebrine for mother moth in the silkworm.

为了保证蚕种质量，提出了家蚕微粒子病母蛾抽样检查的五次抽样方案。