optimist
noun [ C ] uk/ˈɒp.tɪ.mɪst/ us/ˈɑːp.tə.mɪst/
C1 乐观主义者,乐天派
someone who always believes that good things will happen
She's a born optimist (= someone who has always been optimistic). 她天生是个乐天派。
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