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

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

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