Definition: someone who always believes that good things will happen Level: C1
尽管遇到挫折，他仍然是个乐观主义者。
Despite the setbacks, he remains an ___optimist.
她是个无可救药的乐观主义者，很有幽默感。
She is an incurable ___optimist with a great sense of humor.
真正的乐观主义者在每个困难中看到机会。
A true ___optimist sees opportunity in every difficulty.
