形容词
中文翻译：悲伤的
同义词：
['depressed', 'disheartened', 'gloomy']
例句：
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1. She looked at the sad face of her friend and felt a pang of sympathy.
她看着朋友悲伤的脸，感到一阵同情。
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2. His sadness was evident in his eyes as he sat alone in the park.
他孤独地坐在公园里，眼中流露出悲伤。
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3. The news of her passing brought sadness to all who knew her.
她去世的消息让所有认识她的人都感到悲伤。