忧沉

例句：

1. 1. I'm feeling quite worried about the upcoming exams.
   我很担心即将到来的考试。
2. 2. She waslost in thought, deep in worry.
   她陷入了沉思，深深地忧虑着。
3. 3. The old mansat there, deep in worry over hisson's health.
   老人坐在那里，深深地忧虑着他儿子的健康。