earthquakes strike suddenly violently and without warning at any time of the day or night if an earthquake occurs in a populated area it may cause many deaths and injuries and extensive property damage
地震在白天或晚上的任何时间突然猛烈地、毫无征兆地发生，如果地震发生在人口稠密的地区，可能造成许多伤亡和广泛的财产损失
以上为机器翻译结果，长、整句建议使用 人工翻译 。