Luckily, a doctor happened to be on the spot when the old man collapsed.

幸运的是老人晕倒时恰好有位医生在场。

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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。

《柯林斯英汉双解大词典》

If mistakes occurred, they were assumed to be the fault of the commander on the spot.

如果出现了错误，它们就被以为是现场指挥官的错。

《柯林斯英汉双解大词典》

"Once a product lands in the United States, there are other tests that can be administered by the FDA on a spot-check basis.

VOA: standard.2010.05.27

The popular presenter will be on the spot in Moscow to see whether the UK's fresh efforts fly or flounder - including his own.

BBC: Norton takes the Eurovision mic

The first advantage is that ozone can be made on the spot (from air) with an electrical discharge, so it does not have to be trucked to the user.

FORBES: The Ozone Solution

Swann agreed the number looked large but presenting news programmes had to be done on the spot - unlike newspaper journalism, which he doubted would show up much better if sub-editors and printers accompanied journalists to the conference.

BBC: NEWS | UK | UK Politics | The fear of 'hippies' at the BBC