They form a train track repair crew.

他们组成一组铁轨维修人员。

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Meanwhile, as track tries to repair its tattered image, a dozen American track stars, including Gay, have voluntarily entered a program to have their blood and urine tested regularly.

在径赛组织努力恢复形象的同时，包括盖伊在内的竞赛名将们自发的加入了一个定期血检和尿检的项目。

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The company appears to be on track, albeit in repair mode, and gearing up for a kind of drilling homecoming in the Gulf.

虽然仍处于“修复模式”(repair mode)，但该公司似乎正在重回正轨，并正加速重返墨西哥湾地区的石油钻探领域。

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East Midlands Trains (EMT) said Network Rail engineers needed track access to carry out repair works.

BBC: East Midlands derailment: Four-day revised timetable

The sites are closed while investigators try to track the vandals and assess and repair the damage, park officials said.

WSJ: Outbreak of Graffiti Defaces a Beauty Spot

The collapse severed the railway, so during the final stages of repair work, new track will be laid to reconnect the sections of the line.

BBC: GWR heritage railway embankment repairs begin