To subject (glass or metal) to a process of heating and slow cooling in order to toughen and reduce brittleness.

给(玻璃或金属)加热并使之慢慢冷却以使之变硬并减少易碎性。

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To subject (glass or metal) to a process of heating and slow cooling in order to toughen and reduce brittleness.

给(玻璃或金属)加热并使之慢慢冷却以使之变硬并减少易碎性。

youdao