Something, usually something unpleasant, that is protracted lasts a long time, especially longer than usual or longer than you hoped.
①After protracted negotiations, Ogden got the deal he wanted.
②The war was protracted for four years.
③They protracted their visit for some weeks.
《经济学人》一篇关于中国共产党成立一百周年的文章 Seizing the moment, cautiously 也出现了这个表达：
[scode type="green"]tear down
If you tear something down, you destroy it or remove it completely.
①The city will tear down the building and create a park.
②I imagine they'll be tearing the building down sooner or later.
So he can tear down the building.