Ornithopter
n. 扑翼飞机
🗣️ 情景例句
Turn the key before you pump the pedal, or you'll flood the engine.
加水之前转动钥匙，要不发动机就给浇灭了。
We tried in vain to make him change his mind.
我们试图使他改变他的主意，但白费力气。
Do we have to wear the helmets?
我们得戴上防护帽吗？