However there are serious concerns.
尽管如此，人们还有更严重的担忧。
我非常关注他。
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。
The program was halted after serious concerns were raised about it.
在大家表示出严重担忧之后，该项目已经终止。
This water may be legal, but it raises serious health concerns.
这样的水可能合法，但它引起严重的健康关注。
They also have serious health concerns.
他们也为严重的健康问题担忧。
They also have serious health concerns.
他们也为严重的健康问题担忧。
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