Gdf
n. 气体动力设备（Gas Dynamic Facility）
🗣️ 情景例句
Make a right at the stop sign.
就在停车再开标志那里向右拐。
He has a dish of jam.
他有一碟火腿。
As soon as he had got into the car, I said good morning to him in French and he replied in the same language.
他一上车，我就用法语向他问早上好，他也同样用法语回答我。