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。
Near simultaneous explosions rocked the London subway and a double-decker bus at the morning rush hour.
几乎同时,在上午高峰期,爆炸攻击了伦敦地铁和一辆双层巴士。
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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