当人们变老。有时他们就会变得暴躁而又顽固。

When people grow old, sometimes they turn to be irritable and stubborn.

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但是当他们继续变老时，这个水平会开始上升。

But then as they continue into old age, their happiness starts to clime back up.

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当人们变老的时候，爱好可以帮助他们保持健康。

When people become old, hobbies can keep them healthy.

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当人们变老的时候，爱好可以帮助他们保持健康。

When people become old, hobbies can keep them healthy.

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