breeding silkworm insurance 养蚕保险
breeding method of mulberry silkworm 家蚕育种方法 ; 家蚕育 ; 家蚕育种要领
breeding of silkworm eggs 蚕种保育
breeding of silkworm race 蚕品种选育
domestic silkworm breeding 家蚕育种学
Silkworm Breeding and Mullerry 蚕桑事业
silkworm molecular breeding 家蚕分子育种
Guyu one that spring silkworm breeding farm to be invested in war, therefore, Qingming to Guyu just idle period, was also a bright and sunny, just merry.
谷雨一到，农家就要投入饲养春蚕的大战，所以，清明至谷雨这段时间正好闲着，又值风和日丽，正好行乐。
In Song Dynasty, silk technology was nearly perfect, forming a complete set of production processes including silkworm breeding, and then weaving into the garment.
宋代，蚕丝工艺已臻于完善，已经形成养蚕、织造到成衣，形成了一整套生产工艺。
Then, they prepared to spring silkworm breeding.
接着，便准备饲育春蚕。
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