groundbreaking       
adjective uk/ˈɡraʊndˌbreɪ.kɪŋ/ us/ˈɡraʊndˌbreɪ.kɪŋ/
 开辟新天地的,开创性的,创新的
If something is groundbreaking, it is very new and a big change from other things of its type.
  His latest movie is interesting, but not groundbreaking. 他最近拍的电影很有趣,但没有什么创新。 
 Synonym: innovative