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单语范例（未经PONS编辑处理）
Ion cannons appear in movies and television shows that have a science-fiction based setting.
en.wikipedia.org The cannons were moved rearwards in the nose to make room for the radar.
en.wikipedia.org Though the ship fires at it with cannons, the monster rams the ship.
en.wikipedia.org It was the first naval battle in history where cannons were used on ships.
en.wikipedia.org The wreck site includes cannons and other metallic items from the ship.
en.wikipedia.org