unannounced

漢語翻譯

英文解釋：

形容詞 unannounced:

1. without warning or announcement- M.A.D.Howe
   同義詞：unheralded, unpredicted

例句：

1. He entered unannounced.
   他未經通報便進出。
2. Having arrived unannounced for supper, we had to take potluck.
   由於沒有提前通知我們要來吃晚飯，我們只能吃些家常便飯