The bubbling muck had immense value - but it had to wait for the demands of the kerosene lamp and the internal combustion engine.
这个泡泡肥料有了很大的用途—不过它得等待人们对煤油灯和内燃机的需求。
In the early years of the 19th century, farmers in western Pennsylvania kept their wagon wheels greased with puddles of bubbling muck that studded the countryside.
在19世纪早期，西部宾夕法尼亚州的农民都给自己的马车轮子抹上乡下随处可见的气泡肥料胶土。
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