A lullaby is a quiet song for children. 摇篮曲是平和的歌曲，专为儿童谱写的。

　　It helps children go to sleep. 它有助于孩子入睡。

　　You may still remember your mother's lullaby songs. 你可能还记得妈妈哼得摇篮曲吧。

　　Each country has many different lullabies. 每个国家都有很多不同的摇篮曲。

　　Famous composers also made unique lullabies. 著名的作曲家也创作过独特的摇篮曲。

　　If you hear these lullabies, you feel very comfortable. 如果你听听这些摇篮曲，你会感觉非常舒服。