Greg tipped police off about a drunk driver.

格雷格向警方报告了一名酒后驾车司机。

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Not really, because the police don't have time to police every single driver.

因为警察没有时间监督每一个司机，所以不完全如此。

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The police interviewed the driver, but had no evidence to go on.

警察询问了司机，但没有得到继续调查的证据。

《柯林斯英汉双解大词典》

At 50mph, which he conceded he might have been doing, a police driver had no problem.

BBC: NEWS | UK | Wales | South East Wales | Defence plea in road deaths case

Mr Milton, an advanced police driver for 18 years, had earlier told the court there was "nothing to distinguish the island" by way of markings.

BBC: PC Mark Milton cleared of charges after 92mph crash

South Yorkshire Police refused to discuss whether a car and police driver would be made available to Mr Hughes during the period of his driving ban.

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