The text boxes in the left panel have been placed in a random order. Restore the original order by dragging the text boxes from the left panel to the right panel.
a) Even the internal structure could be modified in new ways; different materials could be incorporated as the process goes along.
b) Researchers have developed a system that can 3-D print the basic structure of an entire building.
c) Structures built with this system could be produced faster and less expensively than traditional construction methods allow.
d) Ultimately, the researchers say, this approach could enable the design and construction of new kinds of buildings that would not be feasible with traditional building methods.