Ngb
abbr. negative guard board 底片档板，阴极档板
🗣️ 情景例句
in almost a full week.
差不多有一整个星期了。
Full details regarding packing and marking must be strictly observed.
请严格遵守包装及商标的细则。
She went into my room and got a big surprise when she saw all those books on the floor.
她走进我的房间，当她看到地板上的那些书时，大吃一惊。