1810, "delayed," past participle adjective from retard (v.). In childhood development sense, "mentally slow," attested from 1895 (perhaps inspired by Italian tardivi).
实用例句
1. The progression of the disease can be retarded by early surgery.
早期手术可以抑制病情的发展。
来自《权威词典》
2. He was so slow that many thought him mentally retarded.
他迟钝得很,许多人以为他智力低下.
来自《简明英汉词典》
3. Her death was retarded by five years because of good treatment.
由于良好的治疗,她多活了五年.
来自《简明英汉词典》
4. China started special education for the mentally retarded children in 1979.
