Gdf
n. 气体动力设备（Gas Dynamic Facility）
🗣️ 情景例句
my brother Robbie,
我弟弟Robbie
Yes, but I don't want go downtown.
是的，但是我不希望上街。
Oh, hello, Jim. Glad to see you again. How are you?
啊，你好，吉姆。很高兴又见到你。你好吗？