retarded

名词 retarded:

1. people collectively who are mentally retarded
   同义词：mentally retarded

动词 retard:

1. slow the growth or development of
   同义词：check, retard, delay
2. cause to move more slowly or operate at a slower rate
   同义词：retard
3. be delayed
   同义词：retard
4. lose velocity; move more slowly
   同义词：decelerate, slow, slow down, slow up, retard

形容词 retarded:

1. relatively slow in mental or emotional or physical development

1. A substance that retards or arrests a chemical reaction.
   反催化剂延缓或阻碍化学反应的物质
2. Lack of sun retards plant growth.
   光照不足则植物生长缓慢。

re.tard.ed

adj.（形容词）
Affected with mental retardation.
受智力落后影响的
Relatively slow in mental, emotional, or physical development.
智力迟钝的，精神发育迟缓的：在精神、感情或体能发展上相对缓慢的
n.(used with a pl. verb)（名词）（与复数动词连用）
Persons affected with mental retardation considered as a group. Often used withthe.
智力迟钝的：受智力迟钝影响的人们，被看作一个群体集合。常与the 连用