Third chapter in detail introduces"Sonata in E-flat Major"creation background and the edition spread.
第三章详细介绍了《降E大调奏鸣曲》的创作背景和版本的流传。
2
We should call it E-flat and put it up on the E line because there's kind of rule here that you have to use up each letter name in turn, each letter name in turn.