形容词
中文翻译：Unknown
同义词：
['infantile', 'pediatric', 'infantile', 'juvenile例句：1. The baby was born with a rare genetic disorder.（这个婴儿出生时患有一种罕见的遗传病。）']
例句：
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1. The baby was born with a rare genetic disorder.
这个婴儿出生时患有一种罕见的遗传病。
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2.The child's behavior is indicative of an infantile mentality.
这个孩子的行为表明他/她有幼稚的心态。
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3. The parents were concerned about their child's development during the infantile stage.
父母担心他们的孩子在婴儿期的发展。