她坐在那里，身上散发着一种宁静的气息。

She sat there with an air of ___serenity about her.

艺术可以为我们的生活带来宁静。

Art can bring ___serenity into our lives.

冥想之后，他达到了一种深沉的宁静状态。

After meditation, he achieved a state of profound ___serenity.