上一张幻灯片
/ɹɪvˈɜːs ˈslaɪd ˈtʃeɪndʒ/
n
English: reverse slide change · 上一张幻灯片
English · reverse slide changeEspañol · mecanismo de retroceso y cambio de la diapositivaFrançais · commande de marche arrière
释义：Button that causes the previous slide to be projected on the screen.