Why is bellybutton lint blue?

为什么肚脐上的线是蓝色的？

Her bellybutton has never been covered.

她的肚脐从来就没有被挡住过。

In other words, she has always had her bellybutton exposed.

她的肚脐从来就没有被挡住过。

Do gooses get goosebumps and why is bellybutton lint blue?

鹅身上会起肿块吗？为什么肚脐上的毛是蓝色的？

This is because you have never seen it and her bellybutton has never covered.

这是因为你从来就没有见到过她不露肚脐。她的肚脐从来就没有被挡住过。