(承上期)解惑运弓平直金三角铁律关于运弓平直(“运弓中的两个90度角”)的定义强调了弓毛与弦始终呈90度为平,弓毛与琴皮始终呈90度为直的理论,在我看来,这其实就是在站在物理学角度纠正了二胡学习者的几个习惯性的错误观念,并从教学心理学的角度出发强调了这一观点。物理学告诉我们, (Previous period) puzzled bow flat straight Golden Triangle Iron law on bow straight ( “bow in the two 90-degree angle ”) the definition of the bow and chord is always 90 degrees flat, bow hair In fact, the theory of erhu, which is always 90 degrees straight, is in my opinion correct several erroneous erroneous attitudes of Erhu learners from the standpoint of physics. From the perspective of teaching psychology, it emphasizes This view. Physics tells us