retarded fundamental solution

例句：

1. 1.The child is retarded in hisspeech development.
   这个孩子在语言发展上迟缓。
2. 2. The old man's eyes areretarded by age.
   老人的眼睛因年老而迟钝。
3. 3. The team was slowto respond to the new strategy.
   团队对新策略的反应迟缓。