region fill区域填充regionn.地区；范围；领域；地带；地域region job pack area区域操作装配区region inframammaria乳房下区region control block区域控制块region investigation区域研究region quasi-geoid区域似大地水准面region mapping model域映射模式region ofrationality有理区域,有理数域region color feature区域颜色特征region urban culture城市文化region of initiation原始区