CNN原文：

The world's largest active volcano, Mauna Loa on Hawaii, is erupting for the first time in nearly 40 years. Though lava is flowing down one side of the volcano, the eruption is not threatening communities, the US Geological Survey said midday Monday.

世界上最大的活火山——夏威夷的冒纳罗亚火山近40年来首次喷发。美国地质调查局周一中午表示，火山熔岩目前正从火山的一侧流出，但此次火山喷发并未威胁到当地居民。

1.active volcano 活火山

2.Mauna Loa 冒纳罗亚火山

3.Hawaii 夏威夷

4.lava n. 火山岩浆，熔岩

5.eruption n. 喷发

6.US Geological Survey 美国地质调查局

【拓展】

7.crater n. 火山口

例句：Reports of lava overflowing into the southwest portion of the volcano's crater, have come in to the Hawaii Volcano Observatory.

夏威夷火山观测站收到的报告称，熔岩正流入火山口的西南部分。

8.ashfall n. 火山落灰

例句：Ashfall can damage vehicles and buildings, contaminate water supplies, disrupt sewage and electrical systems, and damage or kill vegetation, while abrasive volcanic ash can irritate eyes and lungs.

火山灰会损坏车辆和建筑物，污染供水，破坏下水道和电力系统，破坏或杀死植被，而粗糙的火山灰会刺激眼睛和肺部。

9.extinct volcano 死火山

例句：An extinct volcano can no longer erupt.

一个死火山已不能再爆发。

10.dormant volcano 休眠火山

例句：A dormant volcano may explode at any time.

休眠火山可能在任何时间爆发。