1. 补习的：below average 低于平均水平的,差的, | advanced 先进的,高级的 | remedial 补习的

2. 治疗的：remediably 可治疗地 | remedial 治疗的 | remedially 治疗地

3. 补习：feedback 回馈 | remedial 补习 | portable classroom 活动教室

4. 补救的：remedial operation 维修作业 | remedial 补救的 | remedy a failure 补救损伤

1. 补习的;辅导的
    Remedial education is intended to improve a person''s ability to read, write, or do mathematics, especially when they find these things difficult.

    e.g. ...children who required special remedial education...
           要求特殊辅导教育的儿童
    e.g. His remedial teacher sees signs of progress in his reading and writing.
           他的辅导教师发现了他在阅读和写作方面进步的迹象。

2. 治疗的;帮助康复的
    Remedial activities are intended to improve a person''s health when they are ill.

    e.g. He is already walking normally and doing remedial exercises.
           他已经可以正常行走了，而且正在进行康复练习。

3. 补救的;纠正的
    Remedial action is intended to correct something that has been done wrong or that has not been successful.

    e.g. Some authorities are now having to take remedial action.
           一些权威机构现在不得不采取补救行动。

1. tending or intended to rectify or improve

    e.g. a remedial reading course
           remedial education

2. tending to cure or restore to health

    e.g. curative powers of herbal remedies
           her gentle healing hand
           remedial surgery
           a sanative environment of mountains and fresh air
           a therapeutic agent
           therapeutic diets

    Synonym: curativehealing(p)alterativesanativetherapeutic