Gdf
n. 气体动力设备（Gas Dynamic Facility）
🗣️ 情景例句
Oh, you've been here before.
噢，你以前来过的。
And to stay ahead of the competition is to openly and freely exchange our opinions.
处于竞争领先地位的方法就是公开、自由交换我们的想法
I feel a little afraid, said Kate. I'm sure I can smell something.
“我感到有点害怕，”凯特说。“我敢肯定我觉察到什么了。”