Mount Etna's most destructive eruption in history went on for four months in 1669, singeing a dozen villages, breaking through Catania's city walls, and finally steaming to a standstill in the sea.
1669年，埃特纳火山史上最严重的一次喷发持续了四个月之久，烤焦了十数个村庄，烧穿了卡塔尼亚城的城墙，最终流入大海才静止。
Finally, a serious addiction is distinguished from a harmless pursuit of pleasure by its distinctly destructive elements.
最终，显著的破坏性元素把严重的上瘾与其他无害的对快乐的追求区分开来。
Finally using the destructive ac voltage testing method, accurately find the failure for repairing which improve the quality of power supply.
最后使用破坏性试验交流耐压试验方法检查，准确的判断了故障点，使之得以修复，提高了供电质量。
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