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
Yes, indeed.
对, 没错。
Yes, I got dressed and had breakfast.
是,我穿好衣服了并且吃了早餐。
Some people don't like winter, but I quite like it.