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(zhàn)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(jì)時羅馬人繼承希臘傳統(tǒng),就修建了賽馬場和露天競技場.

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