retardationKK [ritɑrˋdeʃən] /ɹitɑɹˈdeɪʃən/发音名词1延迟、阻滞、延缓正式Cold weather caused a noticeable retardation of the plants' growth.寒冷的天气明显延缓了植物的生长。2减速物理The engineers measured the retardation of the train before the curve.工程师测量了列车进入弯道前的减速情形。3智能障碍、智能发展迟缓旧式、冒犯Older medical texts still use the term mental retardation.较旧的医学文献仍使用智能障碍这个说法。用这个字练口说→