名词
中文翻译：发展迟缓
同义词：
['underdevelopment', 'underachievement', 'maldevelopment']
例句：
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1. The child's developmental retardation is a cause for concern.
孩子的发育迟缓令人担忧。
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2. The team's performance was severely affected by the lack of training.
团队的表现严重受到缺乏训练的影响。
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3.The researcher found that environmental factors played a significant role in the child's developmental retardation.
研究者发现环境因素在孩子的发展迟缓中发挥了重要作用。