在接受了不太理想的手术之后，孩子们常常出现身体活动能力下降，血液凝结，心律不齐等问题。

After a less-than-optimal operation, children sometimes experience a reduced capacity to perform physical activities and may experience blood clotting and ventricle arrhythmias.

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背景：轻微的(而不是临床上可以检测出的)神经学畸形(SNAs)与没有明显的神经学疾病的成年人身体活动能力受损有关。

BACKGROUND: Subtle, but clinically detectable, neurological abnormalities (SNAs) are associated with impaired physical performance in elderly persons without overt neurological diseases.

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尽管他的这种ALS病使他身体丧失实际的活动能力，他的勇气和幽默却仍然完美无缺，他的智力任其自由漫游。

While ALS has made Hawking a virtual prisoner in his own body, it has left his courage and humor intact his intellect free to roam.

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