名词
中文翻译：退火
同义词：
['anneal', 'temper', 'reheat']
例句：
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1. The steel was annealed to remove internal stresses.
钢材经过退火来消除内部应力。
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2. During the manufacturing process, the metal is often annealed to improve its strength.
在制造过程中，金属经常进行退火以增强其强度。
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3. The metal parts were annealed at a low temperature to prevent cracking.
金属零件在低温下退火以防止开裂。