The 69-year-old physicist fell seriously ill after a lecture tour in the US in 2009 and was taken to Addenbrookes hospital in an episode that sparked grave concerns for his health.

自2009年在美国举行了巡回演讲之后，这位现年六十九岁的物理学家就大病了一场，其间被送到阿登布鲁克医院（Addenbrookes hospital）进行救治的消息还引发了公众对其健康的严重关注。

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The safety of GM food is hotly debated across traditional and online media, with the public expressing grave concerns over the safety of GM foodstuffs.

无论是在纸质媒体还是在线媒体上，转基因食品的安全性都是一个被激烈争论的问题，公众对转基因食品的安全性表示严重关切。

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They have been charged with being elected on the Change and Reform list, and this causes us grave concerns,".

VOA: standard.2009.04.09

Police said they have grave concerns for Mrs Meagher's safety five days after her disappearance.

BBC: Jill Meagher disappearance: Melbourne CCTV footage shown

Annan himself expressed grave concerns about the situation in Syria in a letter to the U.N.

CNN: STORY HIGHLIGHTS

"It's very uncharacteristic (of Bordeaux) and that's why we have grave concerns, " Bergamine said.

CNN: Search of pond completed in missing GI case