随着人们生活水平的不断提高,钢琴已经成为越来越多家庭的重要组成部分。有些小琴童在练琴的过程中,会发现钢琴的声音好像有点变化,这是怎么回事呢?要想解答这个问题,我们得先来看一看钢琴的构造。打开钢琴的顶盖,我们可以看到钢琴里面有一个大的金属板,金属板上面钉着好多钉子,钉子上还拉着好多钢丝。这些都是什么呢?它们和钢琴跑音又有什么关系呢? As people’s living standards continue to improve, the piano has become an important part of more and more families. Some little children in the process of practicing the piano, you will find the sound of the piano seems a little change, what is going on? To answer this question, we must first look at the structure of the piano. Open the top of the piano, we can see there is a big piano inside the metal plate, nail plate with a lot of nails, nails also pulled a lot of wire. What are these? What is the relationship between them and the piano?