The silkworms are making/spinning cocoons.

蚕正在作茧。

Unit 43 Why Can Silkworms Spin Spider-silk?

蚕为神马能吐蛛丝？

They also cultivate fine breeds of silkworms.

他们还培养了良种蚕。

That was how the Chinese first raised silkworms.

中国人就是这样开始养蚕的.

Silkworms are the larva of the mulberry silk moth.

丝蚕其实是桑树蛾子的幼虫.

Silkworms spin silk and wrap themselves in cocoons.

蚕吐丝并把自己包在茧里.

They increased their income by raising silkworms and so on.

他们靠养蚕等增加了收入。

A moth of the family Bombycidae, which includes the silkworms.

蚕蛾科的模式属;中国的蚕蛾.

New mulberry trees wereplanted, silkworms and looms brought in.

现在当地种植了新的桑树, 也引进了蚕和织机.

The commune members adopted new techniques in raising silkworms.

公社社员采用新的养蚕技术。