When large volcanoes erupted they just burst tons of particle into the atmosphere where the particles then reflect light.
当火上爆发式会有很多吨的粉尘进入大气层，之后便反射了光线。
According to the U.S. Geological Survey, more than 600 volcanoes occur in the San Francisco Volcanic Field, and they have erupted at various times over the past 6 million years.
据美国地质调查局，旧金山火山带上大约有600座火山，在过去的6百万年里，它们爆发在不同的时期。
According to the U. s. Geological Survey, more than 600 volcanoes occur in the San Francisco Volcanic Field, and they have erupted at various times over the past 6 million years.
据美国地质调查局，旧金山火山带上大约有600座火山，在过去的6百万年里，它们爆发在不同的时期。
Volcanoes that have erupted many times in history are called active volcanoes. Lassen Peak, in California of the United States, is one of these.
在历史上曾经多次喷发的火山叫活火山。美国加利福尼亚的拉森峰火山就是这些活火山中的一座。
There are 33 large volcanoes on the island, or just offshore, which have erupted since the end of the last ice age, around 12,000 years ago.
在岛上或沿海附近有33座大火山，这些火山约在12000年前，最后一次冰川时代末期喷发过。
It boasts a fearsome array of volcanoes, 33 of which have erupted once or more since the end of the last ice age, around 12, 000 years ago.
那里的火山多得吓人，而且自从上一次冰河时代(约12000年前)以后，其中有33座都爆发过至少一次。
About sixty-three hundred years ago, a flyspeck island off southern Kyushu named Kikai exploded with a force that would dwarf all the more famous volcanoes that have since erupted around the world.
大约6300年前，九州南部的小岛Kikai在一场史无前例的火山爆发中消亡。
Other volcanoes that have not erupted for thousands of years, but show signs that they may erupt again, are called sleeping, or dormant volcanoes.
其他那些几千年没有喷发，但有迹象可能再次喷发的火山，叫静火山。
Kilauea is one of the most active volcanoes in the world. Since 1952, it's erupted 34 times.
基拉韦厄火山是世界上最活跃的火山之一，自1952年以来已爆发了34次。
A chain of volcanoes has erupted in southern Chile, forcing the evacuation of thousands of residents.
智利南部地区一连串火山爆发，当地数千居民被迫撤离。
The Hawaiian Islands are the upper parts of volcanoes that erupted on the bottom of the Pacific Ocean.
夏威夷群岛在火山的上部，这些火山在太平洋洋底喷发。
One of the major volcanoes in Mexico has erupted, causing major floods and landslides in the region.
墨西哥的一个主要火山喷发了，引发洪水和部分地区滑坡。
It boasts a fearsome array of volcanoes, 33 of which have erupted once or more since the end of the last ice age, around 12,000 years ago.
那里的火山多得吓人，而且自从上一次冰河时代(约12000年前)以后，其中有33座都爆发过至少一次。
It boasts a fearsome array of volcanoes, 33 of which have erupted once or more since the end of the last ice age, around 12,000 years ago.
那里的火山多得吓人，而且自从上一次冰河时代(约12000年前)以后，其中有33座都爆发过至少一次。
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