London taxi drivers were voted both friendliest and most knowledgeable. Drivers in the English capital must pass a rigorous examination called the knowledge to earn their taxi license.

伦敦计程车司机在服务态度和路线熟悉程度两项的评选中名列榜首。伦敦的计程车司机在从业前必须通过一项严格的“知识”考试方可拿到出租司机驾照。

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My study was admittedly limited, more of a back-of-the-envelope estimate than a rigorous examination.

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The rub is obviously the painstaking research that goes into identifying such companies, including rigorous examination of their management teams.

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He told BBC1's Andrew Marr show that other countries had more rigorous examination regimes and schools in the UK needed to catch up.

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