Dropping out this time is the track athlete who won over fans in Beijing: Jamaican Usain Bolt, who sprinted to three world records at the Games and has continued breaking them since.

这次未能参赛的是在北京奥运会上一举成名的牙买加选手博尔特(Usain Bolt)。他在比赛中刷新了三项世界纪录，并在此后的赛事中延续了这种势头。

youdao

Bolt parameters of the track tunnel were simulated by using the finite software ANSYS in order to provide a theoretical basis for designing support parameters.

为了给现场锚杆支护参数的设计提供理论依据，采用有限元软件ANSYS对该轨道巷锚杆的支护参数进行研究。

youdao

Based on the flexible array sensors, using hierarchical design and inside-bolt linking structure, we developed the mobile digital-track and its system software.

基于大面积柔性阵列压力传感器，采用分层设计、内销连接结构，研制了可移动式数字跑道及其系统软件。

youdao

So you've got to get it around the track,". Bolt has been blessed with amazing talent, and his height gives him a long stride.

VOA: standard.2009.08.21

Fellow selector and track legend Edwin Moses say it will be difficult for Usain Bolt to win the title for a second consecutive year.

VOA: standard.2010.02.11

The 6ft 5in star created almost as many headlines for his exuberant antics before, after and even during his races in China as he did for his remarkable performances on the track, and Bolt's obvious star quality was a welcome boost for a sport tarnished by doping scandals.

BBC: IAAF hits back in 2012 legacy row

On the Deansgate track last year, Bolt ran the fastest ever 150m.

BBC: Can Tyson Gay break Smith's record in Manchester?

After the latest serious accident when seven people were injured after a cable car slammed to an unexpected stop after hitting a small bolt in the track The Associated Press obtained through a public records request a listing of cable car-related legal settlements over the last three years.

NPR: San Francisco Cable Car Accidents Costs Millions