1·Heart and respiration monitors provide the investigator with the number of heartbeats or breaths taken when a new stimulus is presented.
当新的刺激出现时,心脏和呼吸监测仪为研究者提供其心跳或呼吸的次数。
2·Only after several inadequate breaths under such conditions, resulting in the considerable elevation of carbon dioxide and reduction of oxygen in the blood, is breathing effort adjusted.