形容词
中文翻译：幼稚的
同义词：
['childish', 'juvenile', 'pediatric']
例句：
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1.The child was so cute that everyone couldn't resist laughing at him.
那个孩子太可爱了，没有人能抗拒笑他。
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2.The baby is still in an infantile stage of development.
婴儿还在发育的婴儿期。
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3.Infantile diseases are rare but serious.
婴儿疾病很少见但很严重。