根据一项关于睡觉的鸭子的新研究来看，半睡半醒的鸟儿——大脑的一个半球处于警觉状态，另一个半球处于睡眠状态——控制着大脑的哪一边保持清醒。
Birds that are literally half asleep—with one brain hemisphere alert and the other sleeping—control which side of the brain remains awake, according to a new study of sleeping ducks.
十个人中大约只有两个人处于最佳警觉状态。
上边完成后，从5倒数到1，让自己回到警觉状态。
When you are finished, return to alertness by counting backwards from 5 to 1.
咖啡因具有潜在的角色促进人们在有时差或轮班工作障碍时保持警觉状态，但对于工作伤害或错误的效果仍然未知。
Caffeine has a potential role in promoting alertness during times of desired wakefulness in persons with jet lag or shift work disorder, however its effects on injury and error are unclear.
那种警觉的状态会形成某种进化感。
有些事情可能会出错，这需要人们保持一种高度警觉的状态。
The possibility that something could go wrong required a state of hyper-awareness.
令人惊讶的是，虽然大脑仍然是警觉的，冥想状态减轻了对疼痛的反应，就好象降低了音量。
Astonishingly, although the brain is still alert, meditation lessens the emotional reaction to pain. It's like turning down the volume.
对于已经警觉到环境状态的读者们，他们会被莱纳斯想对此采取的行动所吓到。
Meanwhile many readers who are already alarmed by the state of the environment will find themselves shocked by what Mr Lynas wants to do about it.
事实上，心理学家使用术语“想像的观众”去描述这个高度警觉的状态，在青少年时期这种状态尤为强烈。
In fact, psychologists use the term "imaginary audience" to describe this heightened state of vigilance that is especially strong during adolescence.
但他还是处于紧张状态，他的感官警觉着，想着到底是谁对丝苔妮做的事情这么感兴趣。
But he remained on edge, his senses alert, wondering who was so interested in what Stephanie was doing.
这些状态合起来形成了受害者的”过度警觉“感。
These states combine to form a feeling of "over-alertness" in victims.
站在起跳台上，我集中意志，号令全身的肌肉进入备战状态，两耳则警觉地等待着发令员的指示。
Up on the blocks I willed my muscles into obedience, alert for the starter's commands.
孩子在“放松性警觉”或“非焦虑下期待”的状态下学得最好。
Kidss learn best in a state of "relaxed alertness" or "un-anxious anticipation".
睡眠惯性（SI）又称睡眠惰性，是指唤醒后立即出现的一段暂时的低警觉性、迷惑、行为混乱和认知能力、感觉能力下降的状态。
Sleep inertia (SI) defines a period of transitory hypovigilance, confusion, disorientation of behavior and impaired cognitive and sensory-motor performance that immediately follows awakening.
光线会刺激大脑，让我们持续清醒和警觉的状态。要是环境光线对你有影响，那眼罩绝对是个睡觉必备。
Light stimulates that part of the brain that promotes arousal and vigilance, and eye shades are an absolute necessity for anyone who has any sort of ambient light coming in the room.
光线会刺激大脑，让我们持续清醒和警觉的状态。要是环境光线对你有影响，那眼罩绝对是个睡觉必备。
Light stimulates that part of the brain that promotes arousal and vigilance, and eye shades are an absolute necessity for anyone who has any sort of ambient light coming in the room.
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