1·The silkworms have gone into the bushes to spin their cocoons.
蚕上山了。
—— 《新英汉大辞典》
2·Weaver ants, which spin silk cocoons to protect their larvae.
织叶蚂蚁，它们吐丝结茧，以保护自己的幼虫。
3·Silkworms spin silk and wrap themselves in cocoons.
蚕吐丝并把自己包在茧里。