名词短语
中文翻译：强化和硬化同义词
同义词：
['strengthening', 'hardening']
例句：
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1. The steel was strengthened by the heat treatment process.
通过热处理过程，钢材得到了强化。
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2. The material is being toughened to withstand higher loads.
材料正在被硬化以承受更高的负载。
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3. The metal is undergoing a process of strengthening and toughening for its next use.
金属正在进行强化和硬化的过程，以便用于下一次使用。