未成年的英文：
impuberism
minority
nonage
pupilage
pupillage
under age

参考例句：

under the age limit
未成年

during one's minority
未成年期间

Is Arlene under age?
阿琳未成年吧?

He was still in his minority when he committed the crime.
他犯罪时还是未成年。

A person under the legal age of majority; a minor.
未成年人未达到法定年龄的人；未成年者

The guardian signed the contract on behalf of the minor child.
监护人替未成年的孩子签订了合同。

Cultural and lingual analysis on the words and expressions of nonage of Six Dynasties MuZhi
六朝墓志未成年年龄词语的文化与语言分析

His old parents are in their sixties, grandma in her eighties, and a minor son.
他还有60多岁的父母，80多岁的祖母和一个未成年的儿子。

The court held the parents answerable for their minor child's acts of vandalism
法庭要求父母对于其未成年孩子恶意破坏文物的行为负责

The only major right that a minor does not have in juvenile court is the right to have the case tried by a jury.
未成年人在少年法庭不能享有成年人的权利是不可通过陪审团审理案件。

impuberism是什么意思：
未成年
minority是什么意思：
n. 少数；少数民族；未成年

during one's minority
未成年期间

You neglected the minor premise in a syllogism
你忽视了三段论中的小前提。

She played a minor role in the opera.
她在那出歌剧里扮演了一个小角色。

nonage是什么意思：
n. 青年时期；未成熟；未成年；早期

The nonage can not enter bar.
未成年人不能进酒吧。

It is another bravery to face our inescapable nonage.
面对我们不可避免的不成熟也是一种勇敢的表现。

The conclusion provides primary bases for forest nonage selection.
这一结论可为林木早期选择提供初步依据。