The steel Roof of the Beijing Sport University Track and Field Training Center is a large-span spatial steel tube truss structure.

北京体育大学田径训练中心屋盖为大跨度空间钢管桁架结构。

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Temperature span is one of the main factors to affect the jointless track on bridge.

温度跨度是影响桥上无缝线路的主要因素之一。

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By analyzing the track of vehicle's lane changing and the span of lane changing, we establish the relation between velocity and Angle of lane changing.

通过对实际车辆单元换道轨迹的观测与换道执行时间的统计分析，建立了车辆换道转角与车速的函数关系。

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And believe it or not, which is a very surprising thing, medical experts are now warning that for the first time in the history of this nation, we're headed for the next generation being on track to have a shorter life span than us.

WHITEHOUSE: The First Lady Urges Healthy Diet and Exercise

Its five lines span 74.2km of track and carry around 4.4 million passengers each day to 64 stations.

BBC: Subway systems by the numbers

Jose Lezcano was aboard as the 6-year-old extended his winning streak to six, a span that began when he switched from the main track to the turf last August at Saratoga.

NPR: DERBY LIVE: Orb Wins After Surging Among Bettors