non-structured       
adjective (also nonstructured) uk/ˌnɒnˈstrʌk.tʃəd/ us/ˌnɑːnˈstrʌk.tʃɚd/
 无结构的,无体系的
not organized according to a system or pattern
  Non-structured creative activities can be just as important for children's education as formal classroom tasks. 对于儿童教育来说,非结构化的创造性活动与正式的课堂任务同样重要。 
 We had a mass of non-structured data from the research project but needed to filter out what was important.
 - More examples
 - Soldiers often struggle with non-structured life outside the army after they are discharged.
 - They deliberately set the session up to be nonstructured to allow an open, relaxed conversation.
 - There are non-structured alternatives to the formal training programme.