瞎操心

练钢琴时，有首曲子乖小宝老是在相同的地方弹错节拍。被妈妈纠正几次后，乖小宝也些不耐烦啦。妈妈只有转变方法，改为激励，a great pianist knows how to control her tempo。乖小宝听后松了一口气： I am not a pianist, so we don't need to worry about that！And I will never be one!