I don't like young lamb as immaturity means little taste and lack of texture.我不喜欢羊羔肉, 因为发育不成熟就意味着缺少滋味, 也没有嚼头。

immaturity of the central nervous system中枢神经系统的未发育完成

There were complaints about my immaturity and lack of judgement.有人埋怨我幼稚、缺乏判断力。