形容词
中文翻译：不快乐的
同义词：
['unhappy', 'discontented', 'unsatisfactory']
例句：
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1.She was unmirthful when she heard the bad news.
她听到那个坏消息时很不高兴。
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2. The weather turned out to be unmirthful for the picnic.
天气对野餐来说并不愉快。
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3. His mood was unmirthful as he walked home alone.
他独自一人走回家时心情很不愉快。