工匠通过退火处理使玻璃更耐用。

The craftsman ___annealed the glass to make it more durable.

金属部件经过退火处理以增强其耐用性。

The metal parts were ___annealed to improve their durability.

玻璃制品在制作完成后需要经过退火处理以防止开裂。

Glass products must be ___annealed after production to prevent cracking.