Gdf
n. 气体动力设备（Gas Dynamic Facility）
🗣️ 情景例句
I'm so tired, I have to take a nap when I get home.
我太累了，回到家后一定要睡上一会儿。
It must be rather difficult for us to push any sales if we buy it at this price.
如果我们按这个价格购买，将很能难推销。
Recognizing who the customer was, the manager was most apologetic and reprimanded the assistant severely.
经理认出了这位顾客，表示了深深的歉意，还严厉地训斥了店员。