initial ageing stage 时效初期
two-stage ageing 双级时效
multi-stage ageing 分级时效
single-stage ageing 单级时效
By 2050 society will enter an advanced stage of ageing.
到2050年，社会进入深度老龄化阶段。
Mild cognitive impairment is the stage between normal ageing and dementia, with symptoms including mild memory or mental problems but no significant disability.
轻度认知障碍介于正常老化和老年性痴呆状况之间，有轻度意识或精神问题，但是没有明显疾病。
The storage stage during the production of rice wine isc alled ageing, which is a natural process companied with physical and chemical changes.
前言： 黄酒的贮存在黄酒生产工艺过程中称为“陈酿”，也就是黄酒自然老熟的过程。
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