When he was a small boy,he could hum songs and difficuld pieces of music.翻译

问题描述:

When he was a small boy,he could hum songs and difficuld pieces of music.翻译

当他还是个小男孩时,他就能哼唱一些歌曲和一些有难度的乐曲
difficuld 是打错了吗?是,谢谢不谢