dead to the world 沉睡的；不省人事的；对世事不闻不问；熟睡；烂醉

【例句】
He was tired after the day's work, and was soon dead to the world.
他一天干下来十分劳累，很快就熟睡了。

Exhausted by their exploits that day the two boys had supper and fell asleep, dead to the world.
那天这两个男孩的英勇行为使他们疲劳不堪，他们吃完晚饭倒头就睡，而且睡得很沉。