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
Well, I know you and Mom have given up a lot
嗯, 我知道你和妈妈省吃俭用
None preaches better than the ant, and she says nothing.