These products were sold at a fraction of the price of legal tobacco and no proof of age was required.
这些产品以合法产品价格的零头出售，不需要证明到了合法购买年龄。
In America, all establishments that serve alcohol require us to show proof of age before entrance is granted or services are rendered.
在美国，所有供应酒的地方都会在允许我们进入或提供服务之前要求我们出示年龄证明。
Brain health is crucial, but don’t panic over forgotten keys, recommends Elizabeth Somer, a dietician and author of Age-Proof Your Body.
著有《让身体长春不老》（Age-Proof Your Body）一书的饮食专家伊丽莎白·萨默（Elizabeth Somer）表示，大脑健康至关重要，但不要因为忘了带钥匙而惊慌失措。
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