Children and teens with a cold or flu should not take aspirin for pain relief because of the risk of Reye syndrome, a rare but serious condition of the liver and central nervous system.

患有感冒或流感的儿童和青少年不应该服用阿司匹林来缓解疼痛，因为这会有雷氏综合症的风险，雷氏综合症是一种罕见但严重的肝脏和中枢神经系统疾病。

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A headache is important because it can be the first warning of a serious condition that could probably be controlled if discovered early.

头痛得重视，因为它可能是一种严重疾病的第一个预兆，如果及早发现的话，这种严重疾病可能会得到控制。

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Of about 1, 500 people injured, some 100 were in serious condition.

据称已有1，500人受伤，另外仍有100人伤势严重。

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However,fifteen percent of patients develop a more serious condition.

VOA: special.2009.05.26

A physician in Morocco familiar with the situation describes the captain's condition as "not serious."

VOA: standard.2009.12.07

His study shows that a diet high in white rice is associated with an increased risk of Type 2 diabetes, a serious health condition in which the body is unable to properly use sugar in the bloodstream.

VOA: standard.2010.06.25

An ultrasound, however, turned up a more serious condition: an abdominal aortic aneurysm (AAA).

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The second patient, also male, was in stable but very serious condition, the hospital said.

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He is transported to a local hospital in "serious condition, " according to Davis, Boston's police commissioner.

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