F1 tyres have an optimum operating temperature, and when they drop below that they rapidly lose grip, which dramatically slows lap times.

F1赛车的车胎对环境温度有要求，当温度低于底限时候轮胎就会失去抓地力，这会大大减慢圈速。

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Vettel has a 13-point lead over Fernando Alonso with three races left of the F1 season and is bidding for his fifth straight win to strengthen his grip on a third title.

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