For some time, this seemed to work reasonably well, but serious weaknesses are now appearing.

在一段时间里，它似乎进行得相当顺利，但严重的不足如今正在显现。

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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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But serious scholars have not endorsed that theory.

只不过严肃派学者不同意这一说法。

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But he was a serious newsman, and in nineteen fifty-two he led CBS' coverage of the national political conventions.

VOA: special.2009.08.16

We have no choice but to understand that Milton's mask is serious business The whole production is one of the utmost seriousness.

我们没有选择只能理解《面具》是件很严肃的事,整个演出都是很严肃的事情。

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She lived in New York for a short time, but she was afflicted with lupus, a very serious illness, and she died at the age of 39 in 1964.

她在纽约度过一段短暂的时光，但她饱受狼疮，一种严重疾病的折磨，最终逝世于1964年。

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Meta-analyses have proven particularly valuable for teasing out rare but serious safety problems with drugs.

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But serious issues lay behind the rotting, brain munching subjects of the academic's tongue-in-cheek examination.

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"His whole personality has this playful but serious nature, playful about life, vitality, " Hancock told CNN.

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