名词
中文翻译：婴儿期
同义词：
['infancy', 'cradle', 'infancyperiod']
例句：
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1. The baby's first words came during its infancy.
婴儿的第一次说话是在它的婴儿期。
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2. The child's infancy is crucial for its development.
孩子的婴儿期对其发展至关重要。
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3. The infancyof the new species was marked by rapidgrowth and adaptation.
新物种的婴儿期以迅速生长和适应为标志。