Ngb
abbr. negative guard board 底片檔板，陰極檔板
??? 情景例句
And have you had an engineer come in to do an inspection?
你們可有一個工程師來做過檢查嗎？
Thank you for a wonderful meal.
謝謝你的美餐。
No, there aren't (any).
不，沒有。