偶尔使用。在柯林斯辞典中， cocoon 是3万个最常用词之一。
英式英语: cocoon NOUN
A cocoon is a covering of silky threads that the larvae of moths and other insects make for themselves before they grow into adults.
...like a butterfly emerging from a cocoon.
英式英语: cocoon VERB
If something cocoons you from something, it protects you or isolates you from it.
There is nowhere to hide when things go wrong, no organisation to cocoon you from blame.
cocoon 的定义—— 柯林斯 英语词典
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