Definition
To be caught off guard or unprepared when something unexpected happens.
措手不及
Many employees were caught napping when the company changed its policies.
許多員工在公司改變政策時措手不及。
The opponent team's quick attack caught our defense napping.
對手的快速進攻讓我們的防守措手不及。
Many investors were caught napping when the market suddenly crashed.
當市場突然崩盤時，許多投資者措手不及。