piano是可数名词。
piano：n.钢琴；adv.轻柔地；安静地；弱；
piano的复数形式是pianos
He started playing the piano at an early age.
他幼年开始弹钢琴。
We couldn't get the piano through the door.
我们无法将钢琴搬过这道门。
He learnt to play the piano at an early age.
他早年就学会了弹钢琴。
温馨提示：
