unannounced test meaning in English
突击考试
Examples
- Unannounced tests conducted at one singapore company proved that it was able to mobilize 75 people within five minutes of using its automated emergency notification system
新加坡的一个公司证明，在一个没有通知的演习中，使用自动灾难通知系统可以在5分钟内动员75人。