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"Developing a new mold" 的英文表达是 "designing and creating a new mold"。"Mold" 在这里是指用来铸造金属或塑料零件的模具。"Designing" 指设计模具的形状和尺寸，"creating" 指制造模具。
例句：
We are currently in the process of developing a new mold for our product line.
我们目前正在为我们的产品线开发一个新模具。
The company specializes in designing and creating custom molds for clients.
这家公司专门为客户设计和制造定制模具。
It took several months to complete the development of the new mold.
完成新模具的开发需要数月的时间。
来源：LIUXUEPAPER.COM整理
