exploration stage造句怎麼寫

Chinese contemporary art has been integrated performance of the last century from the exploration stage to maturity, academic materials drawing on the theory of integrated research better.

The grades of coalbed gas reserves and resources extents are mainly determined by exploration stage and degree of a wildcat area.

How to carry on the attached middle school's sight singing educational model reforming, at present this is still in the exploration stage. There for there this selected topic has certain leading edge.