As a result, this young girl will become both physically and mentally slow as a 40-year-old one.

结果，这个年轻的女孩在身心方面将变得像一个40岁的人那么缓慢。

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His teacher described him as "mentally slow, unsociable and adrift forever in his foolish dreams".

他的老师这样形容他：“思维迟钝，性格孤僻，总是沉迷于自己愚蠢的幻想中。”

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Many years passed before doctors discovered that persons with the disorder were not mentally slow or disabled.

许多年之后医生才发现，患此症者的智力并不低下，身体也并不残缺。

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They were believed to make people mentally slow.

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Studies have shown that staying mentally and physically active can slow or even prevent Alzheimer's-related dementia.

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Much of her recent work at Stanford University has debunked stereotypes about how older people are uniformly slow, cranky and mentally impaired.

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