Volcanic eruptions are like fires in a chimney.

火山爆发就象烟囱里的火焰一样。

First up this Thursday, a volcanic eruption near Bali.

这个星期四我们首先会关注巴厘岛附近的一座火山爆发。

Once thought to ignite volcanic eruptions.

曾经被认为这能引起火山喷发。

The combined power of a million volcanic eruptions on Earth.

相当于地球上100万座火山同时喷发时发出的能量。

These shifts can potentially lead to earthquakes and volcanic eruptions.

这些变化可能会引发地震和火山爆发。

The most destructive volcanic eruption ever witnessed occurred in Indonesia in 1815.

1815年，印度尼西亚遭遇了有史以来最具破坏性的火山喷发。

Large volcanic eruptions also added to the bad conditions.

大规模的火山爆发也加剧了恶劣的环境。

Ash from volcanic eruptions blocks out the sun, Cooling the earth.

火山喷发产生的火山灰遮住了太阳 使地表温度冷却。

Scientists think that some of them were started by asteroid impacts or volcanic eruptions.

科学家认为其中一些是由小行星撞击或火山喷发引起的。

Possible causes include large volcanic eruptions and global warming.

可能的原因包括大规模火山爆发和全球变暖。