三和弦第一转位是将原第三音置于底部。
The first inversion of a triad has the original third at the bottom .
七音和弦的第一转位用65来表示。
Its first inversion would be65 .
以内踝前或跗内侧血管为蒂第一楔骨瓣转位术的应用解剖
Applied anatomy of vascularized transposition of the first cuneiform bone flap