| 单词 | retardation |
| 释义 | retardation retardation /ˌriː.tɑːˈdeɪ.ʃən/ aep /-tɑːr-/ noun [U] FORMAL ► F0 slow development, or development that is slower than it should be: » Severe iron deficiency can cause developmental delay and growth retardation.Thesaurus+: ↑Delaying and wasting timeThesaurus+: ↑Increasing and decreasing speed of motion |
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