at unawares

• adv. 出其不意(突然)

例句

用作副词 (adv.)

1. They sneaked up on him unawares.
   他们偷偷地出其不意地挨近了他。
2. She didn't look good at all in this chance shot.
   她这张出其不意拍下的照片一点也不好看。