required

adjective5 搭配平均频率: 7.4

a mandatory course in a curriculum

必读材料

texts that must be read for a course or on a particular subject

课程或特定主题必须阅读的文本

规定标准

a level of quality or attainment that is mandated

强制要求的质量或成就水平

the necessary standard of proficiency or attainment

the lowest amount or level that is demanded