单语范例（未经PONS编辑处理）
英语
- These threshold values should vary depending on the coal seam and coal measure being mined.en.wikipedia.org
- The area contains coal measures, with shale, mudstone, and sandstone, overlain by yellow clay.en.wikipedia.org
- Their iron ore consisted of iron nodules in the coal measures, or of imported hematite.en.wikipedia.org
- The underlying coal measures throughout the parish were a valuable source of fuel.en.wikipedia.org
- The fireclay strata in the coal measures has a high alumina content.en.wikipedia.org
- The coal measures are visible beneath cliff lines along river valleys.en.wikipedia.org
- The coal measures were later covered by sandstone, then conglomerate, corresponding to a braided floodplain.en.wikipedia.org
- In any case coal measures could easily have made thick deposits on well drained soils as well as swamps.en.wikipedia.org
- It was in this environment that the cyclic coal measures were formed.en.wikipedia.org
- The underlying coal measures throughout the town were a valuable source of fuel.en.wikipedia.org
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英语