1. The property had been in mortmain for centuries, owned by the local church and unable to be sold.
这片土地几个世纪以来一直是永久公地，属于当地教堂所有，无法出售。
2. The outdated regulations created a mortmain that prevented the economy from progressing.
过时的法规造成了一种法权死滞，阻碍了经济的发展。
