开拓kāi tuò（开辟; 扩展） open up; reclaim; extension; open-out prolongation; baring:开拓城乡市场 exploit the urban and rural markets开拓荒地 reclaim wasteland开拓市场 develop (explore) markets为发展石油工业开拓一条道路 open up a path for the development of oil industry开拓中美两国的联系 start contacts between China and the United States中国移民在19世纪为开拓美洲大陆作出了贡献。 Chinese settlers helped tame the American continent during the 19th century.{矿} （采掘前修建巷道等工序总称） developing; opening{数} extension
xian蝦米
