以下为句子列表：
英文: Besides lava flows, Etna produces an almost constant, rhythmic discharge of steam, ash and molten rock.
中文: 除了熔岩流，埃特纳也几乎稳定、有节奏地喷发蒸汽、火山灰和熔融的岩石。
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英文: But now some researchers believe they have found evidence that Etna is very gradually becoming more dangerous.
中文: 然而，现在有些研究人员相信，他们已经找到埃特纳愈来愈危险的证据。
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英文: It is unlikely that Etna will explode like Mount Saint Helens in the near future, but fierce eruptions may become more common.
中文: 虽然埃特纳在近期内不太可能像圣海伦斯那样爆发，但猛烈的喷发可能会更频繁。
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英文: Jianxia Yang, Liuzhou, Guangxi Province, doctoral student of Aetna School of Management of Shanghai jiaotong University in grade 2004 Fall, who majors in Management Science and Engineering.
中文: 杨剑侠，男，广西柳州人，上海交通大学安泰经济与管理学院2004级秋博士生，专业为管理科学与工程。
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英文: Moreover, only about 20 percent of the magma erupted at Etna has a chemical composition similar to that of a rift-zone volcano.
中文: 此外，埃特纳喷出的岩浆，其化学成份只有大约20%和张裂带的岩浆相似。
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