A country may ban drink-driving, for example, but have no breathalysers.

例如，某些国家可能会禁止酒后驾车，但它并没有呼气酒精测试器。

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Thousands of breathalysers were made by various manufacturers under licence, increasingly compact and increasingly efficient.

ECONOMIST: Robert Borkenstein

But the Department for Transport said it had no plans to install in-car breathalysers in cars - or to use them to test drink-driving offenders.

BBC: David Nutt suggests alcohol sensors 'in every car'

He said there were no plans to widen the use of breathalysers, but agreed that "irresponsible" sales of alcohol - particularly drinks sold at a loss - needed to be controlled.

BBC: Oral questions