255 Optimistic, pessimistic 乐观 and 悲观 (lèguān, bēiguān)

clear, bright and cheerful

3 明朗 [-] mínglǎng (bright-clear and bright) clear, bright and cheerful: 态度~ the attitude is clear || 前景~. The prospects are clear. || 现在事情 很~了, 那就是他一定会当选市长. Now it is clear that he will be elected mayor. '

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