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（单词翻译）
Ageing populations
Vocabulary
ageing
getting older
phenomenon
something unusual that happens
burdens
difficult things people have to deal with
stroke
a problem with the brain which can make someone unable to move a part of their body
cancer
a serious disease in which cells in the body grow uncontrollably
diabetes
a serious illness in which the body is unable to control the amount of sugar in the blood
dementia
a mental illness which older people can suffer
chronic
describes an illness or problem which continues for a long time
the global community
the group of countries which sees itself as connected, often helping each other economically and socially
high blood pressure
A medical condition in which the force of blood in the veins is too high
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