求助！倒装的解释！

夏溪球子

In addition many ethnologists at the turn of the century believed that Native American manners and customs were rapidly disappearing, and that it was important to preserve for posterity as much information as could be adequately recorded before the cultures disappeared forever.  
其中to preserve for posterity as much information as could be adequately recorded before the cultures disappeared forever.   包含倒装，该怎么解释呢？正常的语序是怎么样的呢？？