熟睡英语怎么说

熟睡英语怎么说？熟睡英语的说法是 "sound asleep"，来源于拉丁语 "somnus"，意为 "睡眠"。例句：
I was sound asleep when the alarm went off. (我熟睡时闹钟响了。)
The baby is sound asleep in her crib. (婴儿在婴儿床里熟睡。)
He didn't hear the doorbell because he was sound asleep. (他没有听到门铃，因为他在熟睡。)