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B1 中级 英语 4:26 Educational

Nutrition for a Healthy Life

Alliance for Aging Research · 1,543,413 次观看 · 添加于 3 周前

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B1

CEFR 等级

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字幕 (54 片段)

00:06

From the minute we're born, we're aging.

00:08

Constant exposure to our environment, the things we eat, and stresses from both inside

00:13

and outside our bodies all cause us to age over time.

00:18

Aging is highly complex, but scientists are starting to understand what happens at the

00:22

cellular and molecular levels.

00:24

For example, healthy cells are damaged over time when our immune systems shift from reacting

00:29

to short-term problems like injuries and infections, to gradually producing chronic inflammation

00:35

throughout the body.

00:37

Time also gradually shortens the telomeres that act as protective caps for our DNA-containing

00:42

chromosomes.

00:44

These and other changes make our bodies less and less able to deal with stress from inside

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