blue beam（蓝电子束）是什么意思？音标发音+图解场景

蓝电子束 /ˈbluː ˈbiːm/ n

English: blue beam · 蓝电子束

释义：Electron beam hitting the sensitive parts of the screen that are designed to emit blue light.

这个词出现在以下图解场景（1）