名词
中文翻译：黑心
同义词：
['black heart', 'heart of darkness', 'cold heart']
例句：
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1. The man's black heart made him do what he knew was wrong.
那人的冷酷之心让他做了他知道是错误的事。
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2. The story about the black heart is a cautionary tale.
关于黑心的故事是一个警示故事。
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3. Her black heart refused to accept her new job offer.
她的冷酷之心拒绝接受新的工作邀请。