In ancient Persian, “Parvana” means butterfly. Beautiful butterflies, colorful butterflies, romantic and free butterflies. “The Mountains Sing” is a book by the Afghan-American writer Hosseini. There is such a butterfly in it-a butterfly with broken wings. 　　Parvana has a twin sister, Masooma. Two sisters conceived in the same womb, like the North and South Poles of the earth, have led completely different lives since birth. 　　If fate has likes and dislikes, sister Masooma is the favored half, while Parvana is the hated half. 　　Masuma was born smoothly. She has a beautiful appearance and a docile temperament, and is deeply loved by everyone. Where is Parvana? When he was born, the…