The piano is a musical instrument. 钢琴是一种乐器。

　　The piano has 36 black keys and 52 white keys. 钢琴有36个黑键和52个白键。

　　If people hit the keyboards with their fingers, sound comes from inside of the piano. 若是有人用手指敲打琴键，声音就会从钢琴内部传出。

　　What is a piano made of? 钢琴是用什么材料制作而成的呢？

　　It is made of maple wood for the body. 琴身是由枫木制成的。

　　Strong steel for the piano's strings. 琴弦是由强钢制作的。

　　And bass wood for the piano keys. 而琴键是由椴木做成的。