这实验证明植物进行呼吸作用时消耗氧气。
这是因为大脑监督着血液里的二氧化碳量，以此来决定什么时候进行下一次呼吸作用。
This is because the brain monitors the amount of carbon dioxide in the blood to decide when to trigger the gasp reflex.
在每项测试期间，分别对他们的练习时间、呼吸量、呼吸作用和劳累程度进行了监测。
During each test they were monitored for exercise time, breathing capacity, work of breathing and symptoms of exertion.
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