形容词
中文翻译：快乐的
同义词：
['cheerful', 'joyful', 'happy']
例句：
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1.He was filled with mirthful laughter at the news of his success.
听到他成功的消息时，他充满了欢乐的笑声。
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2.The children were mirthful in their playful antics.
孩子们在玩耍时的顽皮行为中充满了欢乐。
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3.Her mirthful smile made everyone feel uplifted.
她那快乐的笑容使每个人都感到振奋。