I had the sense that he was worried about something.

　　我感覺(jué)他有心事。

　　Doctors are worried about the possible spread of the disease.

　　醫(yī)生擔(dān)心這疾病可能會(huì)蔓延。

　　Back at home, her parents were worried.

　　在家中，她的`父母很擔(dān)心。

　　There was a worried expression on her face.

　　她臉上流露出擔(dān)心的神色。

　　They are worried about prospective changes in the law.

　　他們擔(dān)心即將修改法律。