fixing bath（定影盘）是什么意思？音标发音+图解场景

定影盘 /ˈfɪksɪŋ ˈbaθ/ n

English: fixing bath · 定影盘

释义：Tray containing a chemical that fixes the revealed image by making the photographic paper insensitive to light.

这个词出现在以下图解场景（1）