Unannounced
a. 未经宣布的
✅ 同义词
📖 牛津释义
unannounced
adj
without prior warning or notification; unexpected 未事先宣布的; 未通知的; 突如其来的
make unannounced safety checks on equipment 对设备进行突然的安全检查
He arrived unannounced. 他未事先通知而来到.
🗣️ 情景例句
Thank you, sir.
谢谢您，先生。
Were it left to me to decide whether we should have a city without bikes or one without cars.
如果让我来决定我们要一个没有自行车的城市，还是要一个没的汽车的城市。
Ducks know how to swim when they are born.
鸭子天生会游泳