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（ElizabethSomer）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。
I am proof that it isn’t that easy to die, because from the age of 15, well into my twenties, I was working on dying. Most addicts are.
我证明了死不是那么容易的一件事，因为从我15岁开始一直到二十几岁， 我一直徘徊在生死边缘，就像大多数瘾君子一样。
If you look young, you have to show proof of your age when ordering alcohol.
如果你看起来年轻，订购酒精的你必须展示你的年龄的证明。
Still, some experts caution that the association of paternal age with these problems is just that: a possible link with no proof of causality.
然而，一些专家警告说父亲年龄和这些问题之间的联系或许仅仅是这样：一个没有证据证实因果关系的可能存在的联系。
I am proof that it isn’t that easy to die, because from the age of 15, well into my twenties, I was working on dying.
当我裸身站在世人面前时，展现的是一个奇迹，我居然还活在这个世界上。 人是不会那么容易就死掉的，我就是一个例证。
One final irony: in 1950, at age 82, Millikan published his Autobiography, with Chapter 9 entitled simply "the Experimental Proof of the Existence of the Photon — Einstein's Photoelectric Equation."
最后一件讽刺的事情发生在1950年，82岁的密立根发表了他的自传，其中第九章的标题为“光子存在的实验验证—爱因斯坦光电方程”“the Experimental Proof of the Existence of the photon—einsteins Photoelectric Equation .”。
This paper considers influence of proof load, structures age and re-service term to the reliability index on the basis of formula given.
利用给出的时变可靠指标计算公式，分析了验证荷载、结构已服役时间以及后继服役期等因素对结构可靠指标的影响；
She is widely seen as proof that good looks can last for ever. But, at nearly 500 years of age, time is catching up with the Mona Lisa.
她曾经被认为是永恒的美丽的证据。但是在近500年来，时间的烙印还是留在了蒙娜丽莎上了。
With respect to that most essential proof of robustness—the power to stay alive—women are tougher than men from birth through to extreme old age.
关于健在的最有力证据：活下去的能力——女性从出生到极度垂危的晚年比男性身体更加健壮。
In an age where few marriages endure the test of time, 107-year-old Karam and his wife Katari Chand, 100, are proof that happy ever after does exist.
在这个婚姻禁不起时间考验的年代，107岁的老人卡拉姆·昌德和他100岁的妻子卡塔里·昌德向我们证明幸福的长寿婚姻的确存在。
Professor Walker added: "These results provide proof-of-concept that this class of drugs could be useful to treat age-related decline in memory."
Walker教授补充：这些结果提供理论证据表明这种药物对于治疗年龄相关记忆衰减有作用。
Professor Walker added: "These results provide proof-of-concept that this class of drugs could be useful to treat age-related decline in memory."
Walker教授补充：这些结果提供理论证据表明这种药物对于治疗年龄相关记忆衰减有作用。
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