Gdf
n. 气体动力设备（Gas Dynamic Facility）
🗣️ 情景例句
Hello, nice to meet you. By the way, nice shoes you have.
你好，很高兴见到你。 顺便提一下， 你的鞋子很漂亮。
Care brings grey hair.
忧虑催人老。
I had a seat beside the window.
我的座位在窗口旁