Though it is called the "straddling bus," Huashi's invention resembles a train in many respects - but it requires neither elevated tracks nor extensive tunneling.

虽然被称作做“立体快巴”，华世的这个发明和火车却在许多方面都存在相似，但它既不需要铺轨也不需要大量的隧道。

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Television news showed the bus, resembling a goliath bug, edging forward down tracks while two cars nestled underneath.

电视新闻显示，该大型车像一个巨大的虫子，沿着轨道缓缓向前移动，它的肚子下面待着两辆小汽车。

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Police say the bus apparently stopped on the tracks prompting a warning from the train engineer just before the crash.

警方表示，事故发生前，巴士停在轨道上以后，列车工程师发出了警告。

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Rather than ride into the park on snowmobiles from the town of West Yellowstone, we opted for a trip on a historic yellow snow coach -- kind of a small, boxy heated bus on tracks that were first used 50 years ago.

CNN: Taking the kids: A winter trek in Yellowstone

The bus blocked both tracks at the busway entrance, causing delays.

BBC: Cambridgeshire guided bus crash damages tracks

In one of the coolest car customizations we've seen, an engineer retrofitted a 1966 VW bus with snowmobile tracks, creating an all-terrain party wagon that can tear through snow at an impressive 30 MPH.

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