Doctors are worried about the possible spread of the disease.
醫生擔心這疾病可能會蔓延。
Back at home, her parents were worried.
在家中，她的父母很擔心。
There was a worried expression on her face.
她臉上流露出擔心的神色。
They are worried about prospective changes in the law.
他們擔心即將修改法律。
Talk to your doctor if you're still worried.
如果你仍然不放心，就找醫生談一談。