在放射性衰变的过程中放出β粒子的辐射。 radiation of beta particles during radioactive decay.
衰变由于放射性衰变而解体或缩小 To disintegrate or diminish by radioactive decay.
在放射性衰变的过程中放出α粒子的辐射。 the radiation of alpha particles during radioactive decay.
射气几种氡的同位素的放射性气体，是放射性物质衰变的产物 Any of several radioactive gases that are isotopes of radon and are products of radioactive decay.
地质年代测定通过放射性同位素衰变来测定地质年代 Measurement of geologic time, as through isotopic radioactive decay.
半减期被活的有机体摄入的放射性元素经过生物衰减及放射性衰变过程综合，其剂量减至一半所需要的时间 The time required for the radioactivity of material taken in by a living organism to be reduced to half its initial value by a combination of biological elimination processes and radioactive decay.
锕射气氡的一种放射性的，惰性的和气态的同位素，其半衰期为3。92秒 A radioactive, inert, gaseous isotope of radon, with a half-life of3.92 seconds.
由于受降雨、蒸发、生物活动以及放射性衰变等因素的影响，不同的海区海水盐度也不同。 Variations from place to place are due to factors such as rainfall, evaporation, biological activity and radioactive decay.
更别忘了那些昂贵的抗衰老化妆品和大商场及美容店里的皮肤保养。 And let us not forget all the fancy anti? aging cosmetic products and skin treatments in department stores and beauty salons.
公众几乎每天都被“抗衰老”食品、新型维生素以及其他具有神奇功效的食物广告所包围。 Almost daily the public is besieged by claims for "no-aging" diets, new vitamins and other wonder foods.
在一种把年轻等同为美的文化中，大多数美国人一直都在与衰老作斗争。 In a culture that equates youth with beauty,a majority of Americans is constantly at war with aging.
退化因老化而出现的正常身体功能的持续衰退或退化 A progressive decline or degeneration of normal physiological functioning occurring as a result of the aging process.
去年冬天，雅芳推出了抗皮肤衰老的护肤品retroactive,并一举获得巨大成功。 Last winter, Avon launched Retroactive, an anti-aging skin cream that has been a runaway hit.
功效：通过阻止自由基活动起抗衰老的作用。 What they can do: provide anti-aging protection by guarding against free radicals.
根据基因学家的研究，她可能易于早衰及感染疾病。 She may be susceptible to premature aging and disease, according to geneticists.
作用:葡萄含多酚及具有抗衰老效果的天然抗氧化剂。 How it works: Grapes contain polyphenols, natural antioxidants with anti-aging benefits.
老衰组织的正常硬化 The normal hardening of aging tissue.
现售货物；现在正在衰老下去的独裁者 Goods now on sale; the now aging dictator.
如果美国陷入衰退，特别是股市下跌引发的衰退，那么美国穷人和中产阶层者可能突然之间发现自己成了受害的大多数。 If the country fell into recession-especially a recession sparked by a falling stock market-poor and middle-class Americans might suddenly see themselves as an aggrieved majority.
他的健康迅速衰退。 His health is failing rapidly.
克里斯托弗·布皮特教授是一位研究衰老问题的专家。他认为高胆固醇和高血红蛋白会使男人衰老，低胆红素会让女人抗衰老的能力降低。 Professor Christopher Bulpitt, an expert in ageing, said that high levels of cholesterol and the red blood pigment haemoglobin can age men, while low levels of the liver chemical bilirubin may reduce women's ability to retain their youthfulness.
流行病学研究的负责人弘志下方说：“葡萄酒和米酒之所以能够提高人的智商，可能是由于它们含有像多酚那样的物质，据信这类物质会延缓人的衰老过程。” " The benefits of wine and sake [rice wine] in raising IQ could be due to substances they contain, such as polyphenol, which are believed to slow the ageing process," Hiroshi Shimokata, head of epidemiology research, said.
大卫·威肯海泽博士在加拿大温哥华研究衰老问题已有10年时间，他发现一般人的生物学年龄比按时间计的实际年龄要老15年甚至更多。 Dr David Wikenheiser has been studying ageing in Vancouver, Canada, for the past 10 years and has found the average person is 15 or more years older biologically than chronologically.
这种随着时间流逝的活力衰退就叫做衰老。 This decline in vigour with the passing of time is called ageing.
衰老无情地来临，接踵而至的是各种各样的疼痛疾病。 The aches and pains begin as the ageing process inexorably sets in.
胆固醇加上吸烟和日晒可导致衰老。 Cholesterol joins smoking and sunbathing as an ageing agent.