Gdf
n. 气体动力设备（Gas Dynamic Facility）
🗣️ 情景例句
Would you please repeat your offer again?
能否再说一遍您的优惠？
If you would have a thing well done,do it yourself.
想把事情来做好，就得亲自动手搞。
It was used for keeping tea hot after it was made,said Wei Hua. It was filled with hot water.
“那是在茶沏好后用来保温的，”魏华说，“用来装热开水的。”