单语范例（未经PONS编辑处理）
The land revenue was fixed in perpetuity with the zemindar in 1793.
en.wikipedia.org The suzerain, e.g. bishop, abbot, or other possessor, granted an estate in perpetuity to a person, who thereby became his vassal.
en.wikipedia.org The lands and interests are held in perpetuity.
en.wikipedia.org They are, in most cases, established on charitable trust and protected in perpetuity.
en.wikipedia.org By the rules of competition, they were awarded the trophy to keep in perpetuity.
en.wikipedia.org