A2 unhappy because you are thinking about problems or unpleasant things that might happen担心的;忧虑的;发愁的
More examples
Investors were seriously worried when the stock market began to crash.
We were flooded with calls from worried parents.
I'm worried about David.
I've never seen her worried or anxious in any way - she's so laid-back.
Despite his public support, privately he was worried.
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