Ben studied till three o'clock this morning.Now he's dead to the world.中dead to the
问题描述：
Ben studied till three o'clock this morning.Now he's dead to the world.中dead to the
有选择：死去了；精疲力尽；酣睡；头昏眼花
答
dead to the world是深睡的意思,是西方俗语,有调侃意味
那就是酣睡的意思