annealed zone

例句：

1. 1. The steel was annealed to improve its strength and toughness.
   钢材经过退火处理以提高其强度和韧性。
2. 2. The engineer used theannealed zone to create a smoother surface.
   工程师利用退火区来制造一个更光滑的表面。
3. 3. Duringthe manufacturing process, themetal is often annealed to reduce stress.
   在制造过程中，金属经常进行退火以减少应力。