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spec: Here at the bottom of a dying world was the only naturally productive area upon its surface . Introduction to the physical and chemical properties and processes in naturally occurring materials . Meat products , processed ( products from beef , pork , poultry , sheep , offals , and mixtures thereof . Unlike natural languages ( e.g ., English , German , and French ) , which have evolved naturally over thousands of years , Esperanto was created by L. Zamenhof around 1887 . Trials reporting the use of bisphosphonates , vitamin D analogues , calcitonin , and hormone replacement therapy to treat bone disease following engraftment exist . Evidence for this phenomenon is appallingly plentiful . First , and most obviously , they are students who will go on to play leadership roles in higher education , research , business , industry , the performing and fine arts , and the public service . Since Section 515 ( b ) ( 25 ) of the Act requires a natural berm to be left to prevent sliding or erosion , the chance of the benches intersecting naturally with no " natural " slope between them will be very small . There may also be associated ulcers of the mouth or other mucous membranes . Naturally , talk got around to the state of journalism .