名词
中文翻译：Unknown
同义词：
['hardening process', 'hardening agent']
例句：
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1.The steel is undergoing a hardening process to increase its strength.
钢材正在经历硬化过程以增加其强度。
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2.The chemical used in the hardening process is harmful to the environment.
用于硬化过程中的化学物质对环境有害。
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3. The engineer designed a new hardening agent that could be used for various metals.
工程师设计了一种新的硬化剂，可用于各种金属。