By 2050 society will enter an advanced stage of ageing.
到2050年，社会进入深度老龄化阶段。
2
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。
3
The storage stage during the production of rice wine isc alled ageing, which is a natural process companied with physical and chemical changes.