upgrade
v[Tn, Tn.pr]
~ sb/sth (to sb/sth) raise sb/sth to a higher grade or rank 提高某人[某事物]的级别或等级
She was upgraded to (the post of) sales director. 她已提升为销售部主任.
The consulate was upgraded to embassy status. 该领事馆已升格为大使馆. Cf 参看 downgrade.
upgrade n (US) upward slope 向上的斜坡.