请帮忙翻译一下这句

来源：百度知道 编辑：UC知道 时间：2024/05/25 06:14:28
Coal is a combustible, sedimentary, organic rock(composed primarily of carbon, hydrogen and oxygen)formed from vegetation, which has been consolidated between other rock strata to form coal seams, and altered by the combined effects of microbial action, pressure and heat over a considerable time period.

煤是一种易燃的、沉淀性的、由植被形成的有机岩石（主要含有碳、氢和氧）。这些植被和不同的岩层混在一起， 从而形成了煤的前身； 然后在微生物的、压力、温度的综合作用下， 经过一定的时间转化成煤。