18.But colored plastic bottles are typically separated from clear plastic bottles during the recycling process in order to keep the recycled plastic from becoming discolored, Coca-Cola said.
19.And from the chair he glanced up at the large discolored photograph on the wall above, with a brittle brown wreath suspended on a corner of the frame.
20.She stooped to that discolored brow, wiped the perspiration from it and laid a kiss there solemnly; but I saw, not without joy, that she did it as an expiation.