The rainy season was a few weeks away, and so clouds had not obscured the steep volcanic cones that tower over the city, periodically showering the streets with ash.

离雨季还有几个星期，城市周围高耸而险峻的火山还不见云雾缭绕，不时会有火山灰掉落到大街上。

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The team has, however, completed a feasibility study for a pipeline network in Perugia, a medieval city whose narrow, steep streets make existing means of goods delivery particularly inefficient.

尽管如此，该小组已经完成了该管道网络在佩鲁贾的可行性研究，佩鲁贾是一个仅有狭窄，陡峭街道，致使现有货物交付方式十分低效的中世纪城市。

youdao

The team has, however, completed a feasibility study for a pipeline network in Perugia, a medieval city whose narrow, steep streets make existing means of goods delivery particularly inefficient.

尽管如此，该小组已经完成了该管道网络在佩鲁贾的可行性研究，佩鲁贾是一个仅有狭窄，陡峭街道，致使现有货物交付方式十分低效的中世纪城市。

youdao