Sent_en: 2zh By May 30 , the Deepwater Horizon site had released between 468,000 and 741,000 barrels of oil , compared to 60,000 to 150,000 barrels from natural seeps across the entire Gulf of Mexico over the same 39 day period , '' said Cutler Cleveland , a Boston University professor at the university 's Department of Geography and Environment .
Sent_yy: 波士顿大学地理与环境系教授卡特勒·克利夫兰说：“截至5月30日，深海地平线油田已经释放了46.8万至74.1万桶石油，而在同样的39天内，整个墨西哥湾的天然渗出量为6万至15万桶。”