However there are serious concerns.

尽管如此，人们还有更严重的担忧。

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I have serious concerns.

我非常关注他。

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But many in the scientific community also raise serious concerns.

但是，科学界的许多人也提出严重关切。

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"We have made clear to the government of Afghanistan our serious concerns regarding the return of Mr.Dostum and any prospective role in today's Afghanistan,"

VOA: standard.2009.08.17

Prime Minister Silvio Berlusconi says the situation is extremely serious and there are concerns the death toll could rise to 50 or more.

VOA: standard.2009.10.03

It is why they dismissed the results from 83 polling stations so of course we have concerns about very serious allegations of fraud."

VOA: standard.2009.09.11

Other brokers have more serious concerns that are leading them to abandon the majors.

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Iran, Egypt, India and several other countries have had serious concerns about the text.

NPR: Optimism In UN Over 1st Global Arms Trade Treaty

In some cases they are raising serious concerns whether the devices work at all.

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