"untroubled" in Chinese (Simplified)
无忧无虑平静
Definition
没有忧虑、压力或烦恼的，内心平静，没有问题。
Usage Notes (Chinese (Simplified))
正式用词，形容人或地方没有烦恼或压力，经常和“life”、“mind”、“expression”等搭配，强调持续的平静。比“carefree”更中性，偏向没有问题而非直接表达快乐。
Examples
She looked completely untroubled by the news.
她看起来对这个消息完全**无忧无虑**。
He enjoyed an untroubled childhood in the countryside.
他在乡村度过了一个**无忧无虑**的童年。
Her face was untroubled as she slept.
她睡觉时脸上显得很**平静**。
After meditating, he felt untroubled and refreshed.
冥想后，他感到**平静**又充满活力。
His mind was surprisingly untroubled before the big exam.
考试前，他的内心出奇地**平静**。
The lake was still and untroubled at sunrise, like a mirror.
湖面在日出时静谧**平静**，如同镜子一般。