Gdo
abbr. grid-dip oscillator 栅陷振荡器; gun direction officer 枪炮指挥军官
🗣️ 情景例句
I don't see what you are getting at.
我不明白你究竟是什么意思。
How long does it take?
火车要开多久？
When several elephants are being trained at one time,
几只象同时训练时，