They use a system of video cameras, radar sensors and laser range-finders to detect other vehicles, while following a pre-set route mapped out by drivers in ordinary cars.

这些汽车利用一套包括视频摄像机、雷达传感器和激光测距仪在内的控制系统侦测道路上的其他车辆，同时按照由普通汽车驾驶员制定的预先设定路线行驶。

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"I think what you'll find is he has great flexibility in the way he plays and he might not have a set route every game - it depends on who the opposition is, " he added.

BBC: Capello 'to get best out of team'

Murray had not dropped a set en route to the quarter-finals but, having saved one break point in the fourth game, he was broken by Ljubicic in the sixth before the Croatian sealed the set with his sixth ace.

BBC: Ivan Ljubicic beats Andy Murray in China Open

The big-hitting Brands, ranked 59th, unleashed a fearless barrage of attacks off both sides and even led the second set tie break 3-0 only for Nadal to claim the set en route to a 4-6 7-6 (7-4) 6-4 6-3 victory.

CNN: Wild card Monfils takes center stage