Ing
abbr. 惯性导航与制导（Inertial Navigation and Guidance）；强中子发生器（Intense Neutron Generator）
🗣️ 情景例句
Who is it?
谁呀
It is lost labour to sow where there is no soil.
没有土壤，播种也是徒劳。
I had forgotten all about the snails when Robert suddenly said that I must stay to dinner.
我把蜗牛的事已忘得一干二净，罗伯特突然提出一定要我留下来吃晚饭，这才提醒了我。