当这些古老的有机物质经过进一步的埋藏和化学变化，泥炭就变成一种非常软的，像煤物质那样的褐煤。

After More burial and chemical transformation of the aging organic material, the peat becomes lignite, a very soft coal-like material.

youdao

有关的成煤作用包括：泥炭的原地堆积—异地搬运作用、地壳旋回运动所引起的埋藏作用和成煤阶段的热变质作用。

While its geologic activities include peat accumulation and transportation, embedding activity caused by diastrophism and geothermal metamorphism of coal.

youdao

有关的成煤作用包括：泥炭的原地堆积—异地搬运作用、地壳旋回运动所引起的埋藏作用和成煤阶段的热变质作用。

While its geologic activities include peat accumulation and transportation, embedding activity caused by diastrophism and geothermal metamorphism of coal.

youdao