concerned

Environmentalists are deeply concerned about the melting of Arctic ice due to global warming.

(Chinese) 由于全球变暖导致北极冰川融化，环境学家对此深感忧虑。

The doctor looked concerned when the patient's heart rate failed to stabilize.

(Chinese) 当病人的心率未能稳定下来时，医生看起来很担心。