Some amphitheaters could be filled with water so that ship battles could be fought.
一些這樣的圓形競技場還會被注滿水以便表演海上作戰的船只能夠航行.
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In 7 th century BC, Romans inherited the traditions of Greece and built racetracks and unroofed amphitheaters.
公元前七世紀時羅馬人繼承希臘傳統,就修建了賽馬場和露天競技場.
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