透明的黑布
发源地 birthlandplace of originsourceseminaryheadstream例句:美国是棒球的发源地.America is the home of baseball. Asia is one of the places where mankind originated.亚洲是人类的发源地之一。 希腊是古奥林匹克运动会的发源地。Greece was the birthplace of the ancient Olympic Games.
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