That's when an earthquake suddenly lowered the swamp 15 to 30 feet and mud and sand rushed in, covering everything with sediment and killing trees and other plants.
当时，一场突如其来的大地震使得这片湿地下降了15到30英尺（约4.6米到9.1米），泥沙随之奔流而至，沉积物淹埋了一切，所有的树木和植物毁于其中。
The calculation of well killing on the mud blowdown condition is discussed in this paper, and it has been verified in the practice of well killing.
本文对气井在泥浆喷空情况下的压井计算进行了探讨，并在压井的实践中得到验证。
The downpours dislodged hillsides which enveloped houses, hotels, roads and churches in a sea of mud in the resort towns of Teresópolis, Nova Friburgo and Petrópolis, killing at least 270 people.
在休閒胜地Teresópolis，NovaFriburgo和Petrópolis城镇，倾盆大雨造成山坡地移位，房屋、旅馆、公路和教堂倾倒在大量泥浆里，至少270人丧生（译注：迄一月十四日，已造成至少500人丧生）。
The downpours dislodged hillsides which enveloped houses, hotels, roads and churches in a sea of mud in the resort towns of Teresópolis, Nova Friburgo and Petrópolis, killing at least 270 people.
在休閒胜地Teresópolis，NovaFriburgo和Petrópolis城镇，倾盆大雨造成山坡地移位，房屋、旅馆、公路和教堂倾倒在大量泥浆里，至少270人丧生（译注：迄一月十四日，已造成至少500人丧生）。
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