酣睡
The baby is soundly asleep.
那婴儿睡得很熟。
She was too soundly asleep to hear Stefano's return.
她睡得太熟，没有听见斯蒂芬诺回来。
Local homeowners are soundly asleep in the early morning, undisturbed by the loud frogs.
当地的房主人清晨沉睡，未受蛙鸣的打搅。
Bathe small excitedly looking at the prince of soundly asleep, slowly near to, gaze at the facial advent of man's comeliness.
沐小小激动地看着沉睡的王子，缓缓靠近，凝视着男子清秀的容颜。
Shielded by his mother's body, he was totally unharmed, sleeping peacefully as he was brought out. His soundly asleep face warmed the hearts of all rescuers on the scene.
因为母亲身体庇护着，他毫发未伤，抱出来的时候，他还安静的睡着，他熟睡的脸让所有在场的人感到很温暖。
"soundly asleep"是一个英语短语，指"处于深度睡眠且不易被唤醒的状态"。该表达由两部分构成：
在睡眠医学领域，美国国家睡眠基金会（National Sleep Foundation）指出，当人处于"soundly asleep"时，通常对应睡眠周期中的第三阶段（深度非快速眼动睡眠），此时呼吸节奏平稳、肌肉完全放松，对外界刺激反应显著降低。例如婴儿在夜间连续睡眠时，常被描述为"soundly asleep"，表示其睡眠质量较高且持续时间长。
该短语在文学作品中的应用可追溯至19世纪，英国作家查尔斯·狄更斯在《双城记》中曾用"lying soundly asleep"描写角色进入深度休息状态的情景。现代语言学研究表明，该短语在日常对话中多用于强调睡眠质量，常与"snore"（打鼾）、"unaware"（无意识）等词汇搭配使用。
“soundly asleep”是一个描述深度睡眠状态的短语，具体解析如下：
1. 核心词义
2. 整体含义 组合后表示“酣睡、沉睡”，强调睡眠的安稳和不易被打扰。例如：
"After hiking all day, he was soundly asleep by 9 PM."
（徒步一整天后，他晚上9点就酣然入睡。）
3. 用法特点
"The baby fell soundly asleep in the stroller."
（婴儿在婴儿车里沉沉睡去。）
4. 适用语境
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