Finally, the coughing reflex in reaction to irritants in the airway produces not a cough during sleep but a cessation of breathing.
最后，对呼吸道刺激物的咳嗽反射不会导致人们在睡眠期咳嗽，而会造成呼吸暂停。
2
These factors and sleep established very strong conditioned reflex, slightly change will affect sleep, so some people change a place it will be difficult to fall asleep.
这些因素与睡眠建立了十分牢固的条件反射，稍有改变就会影响睡眠，所以有的人换一个地方就难以入睡。
3
Because of the nervous reflex activity in sleep, the muscles of the throat relax, the food is easy to slide into the trachea, is very dangerous.