但我没有考虑火山喷发、地震或者金融泡沫，这只是因为它们没有一个看起来可能是会突然降临的灾难。

Yet I did not consider volcanic eruptions, earthquakes, or financial bubbles, simply because none of those seemed likely to precipitate catastrophes.

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这次火山喷发使山体产生了一个500米（2000英尺）的裂缝并导致了数个熔岩喷泉，它们在火山口周围形成了多个由泡沫填充岩（矿渣）组成的小山丘。

The eruption opened a 500-meter (2,000-foot) fissure, and also produced lava fountains that built several hills of bubble-filled lava rocks (scoria) along the vent.

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对铝合金熔融发泡工艺进行了研究，用火山灰作发泡剂、用钙为增粘剂。通过试验，认为用此法制造泡沫金属是可行的。

This paper researches on the foaming procedure of aluminum alloy in molten state and believes that the procedure is feasible for making foam metals.

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