画家在创作一幅画时可以反复酝酿、重复、修改，直到自己满意为止；作曲家在创作一首乐曲时也可以反复构思、多次试奏直到感觉完美。然而钢琴家上台演奏却是“一锤定音”，无法弥补已弹奏的错音或突然出现的几秒钟的空白。因此，如何在演奏时把平时所练习的成果在舞台上完美地 The painter can make, repeat, modify until he is satisfied with the creation of a painting. The composer can also make concerted efforts when creating a piece of music and try it out until it feels perfect. However, the pianist took the stage to play the “final word” and could not make up for the wrong sound that had been played or the blanks that suddenly appeared for a few seconds. Therefore, how to perfect the performance of the usual practice on the stage when playing