名词
中文翻译：Unknown
同义词：
['iron face', 'stone heart']
例句：
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1. He gave a cold, iron face to the reporters' questions.
他对记者的问题给出了一副冰冷、铁板般的脸。
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2. The old man had a stone heart and would not be moved by anyone's pleading.
老人心如石头，对任何人的哀求都无动于衷。
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3. Her stern expression made her look like an iron face.
她严厉的表情让她看起来就像个铁石心肠的人。