如果这个理论是正确的，那么吸入含有额外二氧化碳的空气应该会引起打哈欠，而吸入纯氧应该可以抑制打哈欠。
If the theory was correct, breathing air with extra carbon dioxide should have triggered yawning, while breathing pure oxygen should have suppressed yawning.
茶对健康的好处大多来自于抗氧化剂——在胡萝卜素、维生素 E 和维生素 C 中也发现了抗氧化剂化合物，它能抑制沿身体血管形成的斑块。
Most of the purported health benefits of tea come from antioxidants—compounds also found in beta carotene, vitamin E, and vitamin C that inhibit the formation of plaque along the body's blood vessels.
科学家还认为，这种药草有比其他植物多10至20倍的褪黑激素：它是一种可能抑制癌细胞增长的抗氧化剂。
The scientists also report that this herb has 10 to 20 times more melatonin -- an antioxidant that may inhibit cancer growth -- than any other fruit or vegetable tested.
应用推荐