undercooked       
adjective uk/ˌʌn.dəˈkʊkt/ us/ˌʌn.dɚˈkʊkt/
 未煮熟的,欠火候的
not cooked enough
  People can become infected after eating raw or undercooked meat. 人们在吃了生的或未煮熟的肉后可能会被感染。 
 To make a nice soft cookie they should be slightly undercooked. 要做出好吃的软饼干,就应该略微欠些火候。 
 See: undercook
 - More examples
 - Avoid restaurant dishes made with raw or undercooked eggs.
 - The fish should remain pink and undercooked in the middle.
 - Undercooked chicken is very dangerous and can lead to severe stomach upsets.