Cinderella
n
1 girl or woman whose beauty or abilities have not been recognized 灰姑娘; (美貌或能力未被赏识的)女子.
2 person or thing that has been persistently neglected 长期被忽视的人或物; 被埋没的人
This department has been the Cinderella of the company for far too long. 这个部门在公司不受重视由来已久.