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There is grave concern for the safety of witnesses.
证人们的安危受到严重关注。
《柯林斯英汉双解大词典》
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The international situation is becoming a matter of grave concern.
他指控我说谎，这是一个严重的错误。
youdao
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The international situation is becoming a matter of grave concern.
他指控我说谎，这是一个严重的错误。
youdao