Gdf
n. 气体动力设备（Gas Dynamic Facility）
🗣️ 情景例句
You can watch the web-cast of this program if you have broadband access to the internet.
如果你能用宽带上网的话，你能在网上收看到这个节目。
May I try it on?
我能试试吗？
But we do not need to send men down to get the oil out, as we must with other mineral deposits.
但是，我们不必像开采其他矿藏那样，把人送到地下去把石油取出。