retardation
n. 延遲; 留級; 制動; 光程差
Retardation is the process of making something happen or develop more slowly, or the fact of being less well developed than other people or things of the same kind.
...other parents whose children had mental retardation.
其他智障兒童的家長
1. a decrease in speed;
2. the extent to which something is delayed or held back
3. any agent that retards or delays or hinders;
4. lack of normal development of intellectual capacities
5. the act of slowing down or falling behind
Asbestos reinforcement confers excellent flame retardation properties on a composite.
石棉增強材料使複合材料具有優異的防火效能.
The theory confirms the increase in the retardation effect with decrease in particle size.
理論證實,隨著顆粒尺寸的減小,這一減速效應將增大.
It is therefore not surprising that self - retardation is not well - documented in the systems we are considering.
因此,在我們所考慮的體系中,自緩聚作用尚未完全證實是不足為奇的.
Most children with Down syndrome have mild - to - moderate mental retardation.
大多數唐氏綜合症兒童有輕度到中度的弱智.
The suggestion of development and extent of fire retardation PP was made.
提出了發展和推廣阻燃聚丙烯纖維的有關建議.