Quotes and estimates can be prepared by computer on the spot.

报价和估价可以当场用电脑做出来。

He answered the question on the spot.

他当场就回答了那个问题。

Running on the spot is good exercise.

原地跑步是一种很好的锻炼。

An ambulance was on the spot within minutes.

几分钟之内，一辆救护车便赶到现场。

The interviewer's questions really put him on the spot.

采访者的问题使他很下不来台。