on the spot

形容词 on the spot:

1. at the scene of action
   同义词：on-the-spot, on-the-scene

副词 on the spot:

1. without delay or immediately
2. in a difficult situation
3. at the place in question; there

1. The police were on the spot within a few minutes of my telephone call.
   我打电话几分钟後警察就赶到了现场。
2. You've put me on the spot here I can't answer your question.
   这你可把我难住了--你这个问题我答不上来。
3. Luckily there was a doctor on the spot.
   幸运的是现场有一位医生。
4. He is hit by a falling tree and killed on the spot.
   一棵树倒下来，把他当场砸死了。
5. He was hit by a falling tree and killed on the spot.
   他被倒下来的树击中，当场死亡。
6. We caught the smuggler on the spot.
   我们当场抓到那个走私犯。