The most difficult exercise, however, is to play legato if the holes used are not next to each other (in this case a true legato is indeed physically impossible).

• 而最困难的练习，就是吹奏的音孔孔与要吹奏的下一个音孔不是相邻的时候（这种情况下吹奏真正的连音在物理上都是不可能的）。