juvenile

noun

1. a young person, not fully developed

Synonym: juvenile person

adj

1. displaying or suggesting a lack of maturity

e.g. adolescent insecurity
jejune responses to our problems
their behavior was juvenile
puerile jokes

Synonym: adolescentjejunepuerile

2. of or relating to or characteristic of or appropriate for children or young people

e.g. juvenile diabetes
juvenile fashions

1. 少年
A juvenile is a child or young person who is not yet old enough to be regarded as an adult.

e.g. The number of juveniles in the general population has fallen by a fifth in the past 10 years.
总人口中少年所占比例在过去10年中下降了1/5。

2. 少年的；未成年的
Juvenile activity or behaviour involves young people who are not yet adults.

e.g. Juvenile crime is increasing at a terrifying rate.
青少年犯罪正在以惊人的速度增长。
e.g. ...a scheme to lock up persistent juvenile offenders.
将青少年惯犯关入监狱的计划

3. （行为）幼稚的，不成熟的，孩子气的
If you describe someone's behaviour as juvenile, you are critical of it because you think that it is silly or childish.

e.g. He's a typical male, as he gets older he becomes more juvenile.
他是个典型的男人，年龄越大越孩子气。

4. 幼仔；幼兽;雏鸟
Young animals are sometimes referred to as juveniles .

1. 幼体：确定是幼虫吗?可是三叶虫的幼虫(larva)是没有胸节的,只有头甲和尾甲;若是长出一个胸节就是幼体(juvenile)了确定是幼虫吗?可是三叶虫的幼虫(larva)是没有胸节的,只有头甲和尾甲;若是长出一个胸节就是幼体(juvenile)了

2. 稚鱼：将重约1~2克的吴郭鱼和朱文锦稚鱼(Juvenile)分别驯养於淡水中一个月以上,环境条件为光周期为光照14小时,黑暗10小时,采循环过滤并定期换水. 再将两种鱼随机分为两组养於常温(25±1℃)及低温恒温槽(15±1℃)中,在实验过程中不供给食物,