At the time of Endeavour's launch, NASA says the International Space Station was traveling at a speed of about eight kilometers-per-second, above western Romania.

VOA: standard.2010.02.08

The beat will do--control--that, so it's the pace or speed of the beat.

节拍才是根本,所以速度指节拍的快慢

耶鲁公开课 - 聆听音乐课程节选

It's the pace or speed of the-- Piece.

是什么的进行速度呢,一段乐曲

耶鲁公开课 - 聆听音乐课程节选

Eighty billion dollars of that total was to be pumped into the U.S.economy to promote development of renewable energy, urban mass transit, high-speed rail systems and clean energy jobs.

VOA: standard.2010.02.25

Construction of California's high-speed train could start in 2012.

VOA: standard.2010.02.15