降级

downgrade; lower the rank of; demote;relegate（尤指参赛队因联赛成绩不佳而被降级）
她被～为助手。She was relegated to the role of assistant./他们虽然连输了3场比赛，但至少目前来看尚不至于落到～的边缘。They’ve lost three matches in a row,but at least they are not likely to be relegated./今年他们正濒于～的边缘。They are nearing relegation this year./学生～send a student to a lower grade/把恐怖威胁的警告从“最危急”～至 “严重”downgrade (or lower down)the terror alert from “critical”to “severe”/～处分punish by demotion;impose a demotion penalty