单语范例（未经PONS编辑处理）
The castle, once a royal castle, was built as a motte and bailey castle and was strengthened in the 14th century.
en.wikipedia.org A motte and bailey castle was built in the 12th century.
en.wikipedia.org This was a timber motte and bailey castle, constructed in two phases, built during the 11th century.
en.wikipedia.org The castle, once a royal castle, was built as a motte and bailey castle.
en.wikipedia.org It is likely that a motte and bailey castle was constructed on the site in the late 11th century.
en.wikipedia.org