首先，即使大豆有可能具备防病特性，但这并非意味着它因此就能抵抗慢性疲倦和慢性忧郁症。
First of all, simply because soy may have disease-preventing properties, that does not mean that it can therefore fight chronic fatigue and chronic depression.
或许，大豆可以预防骨质疏松症，流行性腮腺炎或甚至是水痘，但这并非意味着它能具体地治疗慢性疲倦和慢性忧郁症这样一些问题。
Perhaps soy can help prevent osteoporosis (bone loss), mumps or even chicken pox, but that does not mean that it can specifically address the problems of chronic fatigue and chronic depression.
一项最近的研究表明，居住在北美大陆上的人们要比居住在亚洲大陆上的人们患慢性疲倦和慢性忧郁症的比例分别超出9倍和31倍。
A recent study shows that people living on the continent of North America suffer 9 times more chronic fatigue and 31 times more chronic depression than do people living on the continent of Asia.
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