zhè zuò / jiān yù / guò qù / céng / shì / yī gè / jūn shì / jū yā yíng / rú jīn / yǐ / gǎi zào / chéng / bó wù guǎn

这座监狱过去曾是一个军事拘押营，如今已改造成博物馆。

This prison was once a military detention camp, but now it has been converted into a museum.