单词：before you know where you are
〈口〉立即,马上;转眼之间
before you know where you are的用法和样例：
例句
- They are ready to start at short notice.他们已准备好，一接到通知就立即出发。
- We'll let you know immediately when we find it.我将通知保安部来处理，我们一找到便立即通知您。
- You want to see a doctor at once.你必须马上去看医生。
- You are not obliged to return the book soon.您没有义务马上还书。