There is grave concern for the safety of witnesses.

人们非常担心证人的安全。

柯林斯例句

The matter here is of grave concern to us all.

正被考虑中的事对大家都非常重要.

《现代英汉综合大词典》

Suddenly all hell broke loose. Senators Goldwater and Jackson reacted with expressions of grave concern.

突然间舆论大哗. 参议员戈德华特和杰克逊对此表示了严重的关切.

辞典例句

The international situation is becoming a matter of grave concern.

国际形势正引起人们的密切关注.

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His face simulated grave concern and disappointment.

他脸上装着一幅非常忧虑和失望的样子.

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