Infantilism
n. 幼稚型, 幼稚症\\n[医] 幼稚型, 婴儿型
✅ 同义词
📖 牛津释义
infantilism
n[U]
(of older children and adults) mentally and physically underdeveloped state （指大孩子和成年人）幼稚病, 幼稚型（生理和智力发育不良的状态）.
🗣️ 情景例句
And one thing more.
还有一件事。
Take care and give my by best to your parents.
多保重，代我向你的父母问候。
OK!
好吧！