普雷斯顿博士也承认，美国应该更重视维护年轻人和中年人的健康，降低他们染病的可能，不过他不认为，其他国家在这方面就一定做得更好。
Dr. Preston acknowledges that the United States might do more to keep young and middle-aged people from getting sick, but he says it’s not clear that other countries’ systems are more effective.
我们要重视维他命和矿物质的益处因为他在保持健康方面起了很重要的作用。
The benefits of vitamins and minerals are emphasized because they play an important role in maintaining good health.
我们要重视维他命和矿物质的益处因为他在保持健康方面起了很重要的作用。
The benefits of vitamins and minerals are emphasized because they play an important role in maintaining good health.
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