求翻译：buses numbered 1 to 100 are limited to travel within the city centre.higher numbers have destinations in the suburbs.toursts should not miss the 103 bus which offers one of the most impressive routes,past the Forbidden City and the White Pagoda in Beihai Park.if you get on a double-decker bus,make sure you sit upstairs.you'll have a good view of the rapidly changing city.是什么意思？

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