形容詞 unexpected:

1. not expected or anticipated
2. made necessary by an unexpected situation or emergency
   同義詞：forced
3. not planned
4. happening or coming quickly and without warning
   同義詞：unforeseen

1. Their unexpected arrival threw our plan into confusion.
   他們的突然到來打亂了我們的計劃。
2. The unexpected defeat came as a thunderbolt.
   這意外的失敗猶如晴天霹靂。
3. His reaction on this matter is unexpected.
   沒料到，他對這件事的反應是這樣的。
4. What an unexpected pleasure!
   這真是個意外的驚喜！
5. The unexpected blow did not stagger his resolution.
   這個意外的打擊并沒有動搖他的決心。
6. Because of something unexpected, I wonder if I can change my appointment from Tuesday to Friday.
   由于想不到的原因，我不知道是否可以把約會時間由星期二改到星期五。
7. I gasped with surprise at the unexpected news.
   聽到意外的消息，我驚訝地吸了一口氣。
8. The unexpected guest disordered his plans.
   這位不速之客打亂了他的計劃。