"pensive" in Chinese (Simplified)
沉思的若有所思的
Definition
以严肃或略带忧郁的方式深思，经常陷入重要事务的思考中。
Usage Notes (Chinese (Simplified))
正式和文学用语，用来形容深思或带有淡淡忧愁、严肃色彩的心情，而非只是发呆。常与“look”、“expression”或“moment”等搭配。不等同于“thoughtful”（体贴）或“reflective”（回顾性的思考）。
Examples
He looked pensive as he stared out the window.
他望着窗外时显得很**沉思**。
The child became pensive after hearing the story.
孩子听完故事后变得很**沉思**。
She has a pensive expression in the photo.
她在照片中神情很**沉思**。
"You look pensive. What's on your mind?"
“你看起来很**沉思**。在想什么？”
There was a pensive silence in the room after the news.
消息传来后，房间里陷入了**沉思**的沉默。
On long train rides, I often get into a pensive mood.
在长途火车上，我常常变得很**沉思**。