Definition: to worry or upset someone Level: C1
不断上涨的生活成本令许多家庭感到担忧。
The rising cost of living ___concerns many families.
病人对治疗没有反应，这令医生很担心。
It ___concerns the doctor that the patient is not responding to treatment.
环境污染持续令全世界的科学家感到忧虑。
Environmental pollution continues to ___concern scientists worldwide.
