domestic silkworm breeding 家蚕育种学
Silkworm Breeding and Mullerry 蚕桑事业
chinese tussah silkworm breeding 柞蚕育种
male silkworm breeding technology 专养雄蚕技术
silkworm breeding technique course 养蚕技术课程
breeding of silkworm eggs 蚕种保育
silkworm molecular breeding 家蚕分子育种
breeding silkworm 蚕业生产
Then, they prepared to spring silkworm breeding.
接着，便准备饲育春蚕。
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。
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