1
be + adult
She is now an adult.
她现在成年了。
成年的；成熟的
先理解核心含义，再看它在真实句子里的用法。
成年的；成熟的
Fully grown or developed; mature.
She is now an adult.
她现在成年了。
Fully grown.
Intended for or restricted to adults rather than children due to size, maturity, knowledge level, judgement, etc.
(动物)发育成熟的
(of animals) fully developed
Only adult passengers are allowed to enter the duty-free shop.
只有成年乘客才允许进入免税店。
AI contextual example
The adult cat is much larger than the kitten.
成年猫比小猫大得多。
AI contextual example
This is an adult education program for people who work during the day.
这是一个为白天工作的人提供的成人教育项目。
AI contextual example
an adult animal
一只成年动物
WordNet
She is now an adult.
她现在成年了。
作定语时表示'成人的、成年的'。
adult education programs
成人教育项目
Not this
He is adulthood.
Use this
He is adult.
adulthood 是名词，表示'成年期'，而 adult 是形容词，表示'成年的'，作表语时应使用形容词形式。
Not this
He got adult when he turned 18.
Use this
He became an adult when he turned 18.
表达'成为成年人'时，常用 become an adult 或 grow up，而不用 get adult，因为 get 接形容词表示状态变化，但 adult 作为形容词通常不用于这种结构。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
成年人口
The adult population of the city has grown steadily over the past decade.
过去十年里，这座城市的成年人口稳步增长。
成年生活
She has lived abroad for most of her adult life.
她成年后的大部分时间都生活在国外。
成人教育
He signed up for an adult education class to improve his computer skills.
他报名参加了成人教育课程，以提高自己的计算机技能。
成年期
The butterfly's adult stage lasts only a few weeks.
蝴蝶的成年期只持续几周。
成人监护
Children should use the pool only with adult supervision.
孩子们只有在成人监护下才可使用游泳池。
成人饮品（指含酒精饮料）
We're having a party this weekend; bring your favorite adult beverage.
我们这周末有聚会，带上你最喜欢的酒水吧。
成人监护；大人看管
Don't use the stove without adult supervision.
没有成人监护时不要使用炉灶。
成熟谈话；严肃理性的对话
Instead of yelling, let's have an adult conversation about our plans.
别大喊大叫，我们心平气和地好好谈谈我们的计划吧。
我只需要一点成人教育。
In Hall & Oates's 1984 hit "Adult Education", the line uses "adult" as an adjective to describe learning meant for grown-ups.
在Hall & Oates 1984年的热门歌曲《成人教育》中，这句歌词将“adult”用作形容词，表示面向成年人的学习。
Use adult naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想：adult 开头是 ad（广告），广告有时标“仅限成人”，由此记住 adult 是“成年的/成熟的”。
语域：neutral 常见场景：biology/zoology writing、formal descriptions of animals 表示动物已发育成熟、成体时，多用于生物学或动物学等较正式的书面语境；口语中也可使用，整体语域中性偏正式。
adult 读 /əˈdʌlt/，-ult 发 /ʌlt/。result、insult、consult、cult 的 -ult 也发 /ʌlt/，与 adult 押韵；fault、assault 的 -ult 虽然拼写相同，但 ault 发 /ɔːlt/，读 /fɔːlt/、/əˈsɔːlt/，与 adult 不押韵。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.