a. feeling or showing worry or solicitude
s. involved in or affected by or having a claim to or share in
a. 关心的, 有关的, 参与的, 担心的
1. She is concerned about her friend’s health.
她担心她朋友的健康。
2. The teacher was concerned when students didn't submit their homework.
当学生没有交作业时，老师感到担忧。
3. Many people are concerned about climate change.
许多人对气候变化感到担忧。