Ngb
abbr. negative guard board 底片档板，阴极档板
🗣️ 情景例句
If there's anything you need, just knock on my door.
有什么需要帮忙的话，尽管敲门来找我。
Would you please tell me the exchange rate for pound sterling into RMB?
请你告诉我英镑兑换人民币的汇率是多少，好吗？
and is still non-existent in a number of 'civilized' nations.
今天，在许多文明国家里，义务教育迄今尚未实行。