“措手不及”，汉语成语，指的是工作俄然出不测，一时无法对于。可以翻译为“be caught unprepared，be caught on the wrong foot或be thrown off one’s guard”等。
例句：
这一行为为的是让敌手措手不及。
It was an attempt to wrong-foot the opposition.
马林斯俄然改变话题，这让我措手不及。
Mullins knocked me off-balance with his abrupt change of subject.
