It's only human nature to be worried about change.

　　對變革有憂慮不過是人之常情。

　　The police are worried that the man may be armed.

　　警方擔(dān)心那個人可能攜帶著武器。

　　I had the sense that he was worried about something.

　　我感覺他有心事。

　　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。