verb 下载 🔗分享 表面淬火，渗碳硬化。 To harden the surface of iron or steel by infusing carbon into the surface layer. Examples : "The manufacturer casehardened the gears to make them more resistant to wear. " 制造商对齿轮进行了表面淬火，渗碳硬化处理，以提高它们的耐磨性。 material technical industry 与AI对话词汇游戏阅读练习
verb 下载 🔗分享 使…麻木不仁，使…铁石心肠。 (by extension) To make insensitive to hardship. Examples : "Years of working long hours and dealing with difficult customers had casehardened him, making him less sensitive to their complaints. " 多年长时间工作和应对难缠的顾客使他变得麻木不仁，让他对顾客的抱怨不再那么敏感。 attitude character mind emotion 与AI对话词汇游戏阅读练习
