名词
中文翻译：硬块
同义词：
['solid lump', 'hard mass']
例句：
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1. He felt a sudden sharp pain in his chest, and then he saw a hard lump on his arm.
他突然感到胸口一阵剧痛，然后看到他的手臂上有一个硬块。
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2. The doctor found a hard lump under the skin of her breast.
医生在她的乳房皮肤下发现了一个硬块。
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3. After the surgery, she noticed that there was a hard lump in her stomach.
手术后，她注意到她的胃里有一块硬块。