他们成功地培育了优良的蚕种。

We have developed a fine strain of rice.

目前家蚕微粒子病对蚕种生产造成很大影响。

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

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.

蚕种场桑螟防治策略为：主要做好越冬代桑螟防治和清理工作。

The most importance of control mulberry pyralid in silkworm egg producing farms was to control and clear the over winter generation.

在公元550年之前，生丝一直都只能在亚洲获得，直到两个东罗马帝国的修道士从中国偷走了蚕种并把它带到了欧洲。

Raw silk was obtained only from Asia until 550 AD, when two monks sent from the Roman Empire secretly stole silkworm eggs from China and brought them to Europe.