来自 serious,严重的，严肃的，认真的，-ness,名词后缀。

1. In all seriousness, there is nothing else I can do.

可以非常诚恳地说，我没有其他能做的。

2. "This is not good," he said with great seriousness.

他特别严肃地说：“这可不好。”

3. They had shown a commitment and seriousness of purpose.

他们已经立下承诺，并表达了想要实现目标的诚意。

4. Lillith's formality and seriousness amused him.

利莉思的拘礼和严肃让他觉得好笑。

5. Her voice was imbued with an unusual seriousness.

她的声音里充满着一种不寻常的严肃语气。