Definition: when you feel worried or nervous about something, or something that makes you feel worried Level: B2
对失踪徒步者安全的担忧一直在增加。
___Concern for the safety of the missing hikers has been growing.
公众对新政策有相当大的担忧。
There is considerable public ___concern over the new policy.
我的主要担忧是成本会太高。
My main ___concern is that the costs will be too high.
