大多数人已经注意到了香烟广告与包装上的警戒标示，但是烟民们似乎对它们不予关注。
Most people have noticed the warning labels on cigarette ads and packages, but smokers do not seem to pay much attention to them.
视觉疲劳主要表现为疲惫感、注意力难于集中、对事物的敏感性和警戒性降低、大脑兴奋度降低、工作效率低下等。
The main symptoms of visual fatigue status are fatigues, difficulties in concentrating attention on the things, decrease of sensitivity, vigilance, brain excitability and work efficiency.
我会试着这么来对付他的警戒性，试着朝另一个方向扔块石头，这样他就会转移注意力了。
'I'll try to counter his vigilance by throwing this rock in the other direction so that he may be distracted.'
每一小段醒时的认知技能和机动技能测试能够衡量出志愿者保持警戒和注意的能力。这些测试结果将与那些正常作息志愿者的测试结果进行对比。
Cognitive and motor skills tests every few waking hours measured the volunteers' ability to stay alert and attentive, with results compared to similar volunteers getting a normal amount of sleep.
每一小段醒时的认知技能和机动技能测试能够衡量出志愿者保持警戒和注意的能力。这些测试结果将与那些正常作息志愿者的测试结果进行对比。
Cognitive and motor skills tests every few waking hours measured the volunteers' ability to stay alert and attentive, with results compared to similar volunteers getting a normal amount of sleep.
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