None of them was a double-bus.

它们中没有一个是双层巴士。

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In one experiment, nearly 200 participants boarded a double-decker bus for a tour of Philadelphia.

在一项实验中，近200名参与者登上一辆双层巴士游览费城。

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However, since droplets from a sneeze can travel the length of a double-decker bus, and a cough can infect anyone within about a metre, this is not always possible.

然而，从一个喷嚏而来的液滴能漫游一双层巴士的长度，并且咳嗽能感染一公尺以内的任何人，但这未必永远如此。

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The water is full of darting and jumping fish, and the mangrove roots -- some the height of a double-decker bus -- tower over the boat.

BBC: Relaxing among the Yucatan's flamingos

Guernsey had a double-decker bus service in the 1980s, but officials said there had not been sufficient demand to revive it.

BBC: Guernsey deputy wants double-decker buses like Jersey

Imagine catching all the sights during a tour of London on a double-decker bus or exploring the streets of Rio de Janeiro during Carnival.

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