n.茧；茧状物
v.包围；包裹
Silkworms make cocoons. 蚕做茧。
A cocoon is a kind of silk covering made by an insect. 蚕茧是由昆虫制造的一种由丝组成的外包层。
The children tore the cocoon open to see if there was a pupa. 孩子们撕开蚕茧看看里面有没有蛹。
用作动词 (v.)The last thing he wants to do is to cocoon all weekend in that same house. 他最不愿意做的事是整个周末呆在同一幢房子里茧居。
