单语范例（未经PONS编辑处理）
A visual mechanism for extraction of heading information in complex flow fields.
en.wikipedia.org Also, there used to be some petroleum extraction in the region, but the resources ended.
en.wikipedia.org From 1633 gunpowder was used both for ore extraction and for driving gangways.
en.wikipedia.org This led to the industrialisation of peat extraction during the 1960s as a major market in horticultural peat was developed.
en.wikipedia.org Its former rural community partly remains following the construction of nearby motorways and gravel pit extraction.
en.wikipedia.org