the leaning tower of Pisa from http://www.wpclipart.com/buildings/index.html 比薩斜塔 building、externalsource、italy、landmark、leaning、pasta dinner、pisa、tourism、tower、wpclipart 建造、外部源、意大利、里程碑、倚、麵食晚餐、批薩、旅遊、塔、wpclipart 資料來源：openclipart ( https://openclipart.org/ )
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