immature [ˌɪməˈtʃʊr]

例句:

• Because of the immunity of the immature insects, it'simportant to spray regularly.
  由于幼虫对药物有免疫力，因此必须经常喷药。
  
• He was a young lad, very green, very immature.
  他还是个毛头小子，幼稚得很，一点都不成熟。
  
• He implied that we were emotionally immature.
  他暗示我们情感上还不成熟。
  
• Bello calls China's response to the trip immature.
  来自VOA
• He said I was immature and not paying attention.
  来自THETIMES
• Immature sperm pass out of the testes into the epididymes.
  来自BBC