catch off guard

基本解释

For this reason, you should become comfortable with this so that when updates do come, they will not catch you off-guard.
因此，您应该适应这一点，不要在更新时毫无准备。
But Mr Kalla's announcement did catch the company off-guard with a spokeswoman for Philip Morris International saying: "We are not aware of any planned increases."
继上周一宣布收购案以来，该公司方面称它期待着税率有所上升。但该公司女发言人在面对卡拉副总统的话时说：“我们并不知道要提高烟税”。
Teams such as Algeria, Uruguay, Portugal and Switzerland lay in wait in their own half of the pitch before launching quick counter-attacks to catch opponents off-guard.
像瑞士，葡萄牙，乌拉圭，阿尔及利亚这种球队都是先坐守自己后场，伺机发动快速反击。