anneal/əˈni:l; ə`nil/ v[Tn]make (metals, glass, etc) tough by cooling slowly after heating 使（金属, 玻璃等）退火, 焖火（将金属或玻璃加热, 然後缓慢冷却, 以增强其韧性）.
牛津英汉双解词典