Ngb
abbr. negative guard board 底片档板，阴极档板
🗣️ 情景例句
Seven letters ... two words ...
七个字母……两个字……
The cobbler's wife is the worst shod.
鞋匠的老婆没有好鞋穿。
It was made in Germany in 1681.
是1681年德国造的。