Gdf
n. 气体动力设备（Gas Dynamic Facility）
🗣️ 情景例句
What are the best exercises for my health?
什么是最利于我身体健康的锻炼方式？
Goodbye. Hope to see you again next year.
再见。希望明年再见到你。
We always enjoy ourselves, Mum.Bye-bye.
我们总是玩得很开心的，妈妈。再见。