immature
adj
1 not sensible in behaviour or in controlling one's feelings; less mature than one would expect (行为或控制感情)不成熟的, 不够老练的
He's very immature for his age. 就他的年龄来说, 他还很不成熟.
2 not (yet) fully developed or grown (尚)未充分成长的; 发育(尚)未完全的
immature plants 幼嫩的植物.
What were you doing at about 4 o'clock yesterday afternoon?
你昨天下午在大约4点钟正在做什么?
Shops cater for the do-it-yourself craze not only by running special advisory services for novices, but by offering consumers bits and pieces which they can assemble at home.