Some time ago,an interesting discovery was made by archaeologists on the Aegean(adj.爱琴海的;n.)island of Kea.An American team explored a temple which stands in an ancient city on the promontory of Ayia Irini.The city at one time must have been ,for it enjoyed a high level of civilization.Houses--often three storeys high--were built of stone.They had large rooms with beautifully walls.The city was even equipped with a drainage system,for a great many clay pipes were found beneath the narrow streets.