Tibetan plateau 's territory is vasty , the density of population is small , the inhabitancies of nomads are quite scattered , the condition of producing and life is poor .
摘要青藏高原地域辽阔,人口密度小,牧民居住极为分散,生产生活条件差。
Humans could afford to treat the sea as an infinite resource when they were relatively few in number , capable of only rather inefficient exploitation of the vasty deep and without as yet a taste for fossil fuels .