单语范例（未经PONS编辑处理）
The engines provide for a thrust of 16 tons, approximately 3.5 as much performance as the F-5 engines.
en.wikipedia.org Temperatures below zero F. occur one day or less per year in the south, and 12 days per year in the north.
en.wikipedia.org Summers are very warm and dry, with 30 days reaching 90 F or above.
en.wikipedia.org The variations here are a set of double variations, the first theme is in F minor and the second theme in F major.
en.wikipedia.org The highways pick up a concurrency with F-32 north of the river.
en.wikipedia.org