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科学家们近日表示，今年南极上空臭氧空洞的形状“异乎寻常”，严重向南美倾斜。这表明，常见的极地漩涡发生重大扭曲。 The ozone hole that opens every year over the Antarctic is on course to be the smallest in three decades, scientists have said. 科学家称，南极上空每年出现的臭氧空洞将是30年来最小的。 Researchers say the hole is also a particularly unusual shape this year, being heavily skewed towards South America instead of centring on the South Pole. 研究人员说，今年臭氧空洞的形状也特别不寻常，严重向南美洲倾斜，而不是以南极为中心。 | 
