insufficiently       
adverb uk/ˌɪn.səˈfɪʃ.ənt.li/ us/ˌɪn.səˈfɪʃ.ənt.li/
 不足地|不充分地
in a way that is not enough
  I felt that the whole project was insufficiently researched. 我觉得整个项目调研不充分。 
 The government has been insufficiently strong in defending the interests of consumers. 在维护消费者权益方面,政府管理不力。 
 See: insufficient
 - More examples
 - This is an issue which is insufficiently discussed and confronted.
 - Many complain that the program is insufficiently generous.
 - This aspect of the topic is insufficiently addressed by other books