详细解释:n. 青春前期
词型变化：
形容词:preadolescent详细解释：
pre.ad.o.les.cence
n.（名词）The period between childhood and the onset of puberty, often designated as between the ages of 0 and 2 in girls and and 3 in boys.青春前期：从儿童到青春期开始这段时间，年龄上女孩通常认为是从0岁到2岁，而男孩则通常从岁到3岁
【引伸】
pre.adoles.cent
adj.（形容词）n.（名词）