B2 hoping or believing that good things will happen in the future乐观的
More examples
She ended her speech on an optimistic note.
The doctor said she was optimistic about the outcome of the operation but forbore to make any promises at this early stage.
Earlier sales forecasts were overly optimistic.
The treasurer has been taking a more optimistic view of economic recovery in his recent public pronouncements.
It's a bit optimistic to expect a politician to tell you the unvarnished truth.
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