From Red to Gray: Ageing populations in East Europe and Central Asia: The region needs to get ready to grapple with a unique situation of rapidly aging yet relatively poor populations.
《从豆蔻年华到满头白发：东欧与中亚地区的老龄人口》：本地区要准备好应对迅速老龄化且相对较贫困的人口问题。
The effect of environment factors on the ageing of polymer materials, the ways of artificial aging test and the ways of protection against ageing are introduced.
本文分析了各种环境因素对高分子材料的影响，介绍了常用的几种加速老化试验的方法及老化材料防护措施。
In this paper, the characteristics of natural and accelerated aging of rubber product is discussed. Also, the method and procedure of accelerated ageing tests and the test results are presented.
文中讨论了橡胶制品的自然老化与加速老化的特点，介绍了固体火箭发动机用橡胶制品加速老化试验的方法和步骤，并给出了试验结果与结论。
China formally entered the ageing society in 1999, now it has been in the aging acceleration period.
中国在1999年正式进入老龄社会，并已经进入加速老龄化时期。
China formally entered the ageing society in 1999, now it has been in the aging acceleration period.
中国在1999年正式进入老龄社会，并已经进入加速老龄化时期。
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