He slipped unawares into sleep.

他不知不觉地睡着了。

Misgivings came; they grew troubled and unhappy; a sigh or two escaped, unawares.

疑虑出现了；他们变得烦恼和不快；不知不觉中发出了一两声叹息。

The announcement took me unawares.

这项声明令我感到意外。

The camera had caught her unawares.

她毫无防备地被拍摄下来。

She came upon him unawares when he was searching her room.

他在翻她屋子时，冷不防被她撞见了。