The most common symptom of a stroke is sudden weakness of the face, arm, or leg, most often on one side of the body.

中风的最常见症状通常是身体一侧的脸部、手臂或腿部突然感到无力。

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(Your body normally manufactures Vitamin D with the help of sunlight.) Prolonged deficiency can cause bone and muscle weakness, but two months probably isn't enough to do long-term damage.

尽管医疗队一直在给工人们输送膳食补充剂，他们还是很可能缺乏维生素D（人体一般通过阳光制造维生素D），时间一长可能导致骨头和肌肉的衰弱，但是两个月的时间似乎不足以造成长期损伤。

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Thus time goeth not from him, but with him, and he feels age more by the strength of his soul than by the weakness of his body.

时间在他眼中没有流逝，而是与他自己同在。他感觉自己岁数越来越大，体力也渐渐衰弱，但心灵的力量却越来越强大。

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These include trouble walking, weakness especially on one side of the body, difficulty seeing and difficulty speaking.

VOA: special.2009.08.12

Tests failed to reveal any cause for the chest pains and weakness down the left side of his body, which Mr Tobin claimed to be suffering.

BBC: NEWS | UK | Scotland | Glasgow and West | 'Nurse' Pc found Angelika accused

Tension headaches can sometimes be difficult to distinguish from migraines, but unlike some forms of migraine, tension headache usually isn't associated with visual disturbances (blind spots or flashing lights), nausea, vomiting, abdominal pain, weakness or numbness on one side of the body, or slurred speech.

CNN: Tension headache

Messages from the brain to the rest of the body are disrupted, resulting in difficulty moving, muscle weakness and blurred vision.

BBC: Brain scan of MS patient