A synthetic surface track was used in 1972 where 11 world records and 20 Olympic records were set.

当塑胶跑道于1972年开始被使用时，运动员们就在这一跑道上创下了11项世界纪录和20项奥运会纪录。

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This photomicrograph was obtained by scanning a beam of electrons across the sample while a detector kept track of electrons bouncing off its surface, betraying the specimen's outer shape.

这幅显微照片是通过扫描穿过样品的电子束而获得的，同时检测器对从样品表面反弹的电子进行追踪，这些电子显示了标本的外形。

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TCN manages air, land, space and surface mission domains and can track both low - and high-velocity targets.

TCN管理空中、地面、空间和水面等领域的任务，并可以对低速和高速的目标进行跟踪。

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"The track surface will make it tricky, " said Hamilton, who claimed his maiden Grand Prix victory in Montreal from pole in 2007.

BBC: Hamilton takes Canadian GP pole

C. (AP) Charlotte Motor Speedway said 10 fans were injured Sunday at the Coca-Cola 600 and three of them were taken to the hospital after a nylon rope supporting a Fox Sports overhead television camera fell from the grandstands and landed on the track surface.

NPR: 10 Fans Injured When TV Cable Falls On Race Track

Three groups keep track of global surface temperatures with records that go back more than a century: NOAA, NASA and the British meteorology office.

NPR: World Warm Last Year, But Not Like Record US Heat