So generally it is the chiefs who have been managing these lands and entering into negotiations with the investors who area acquiring land for biofuel production."

VOA: standard.2009.08.23

It's a protein that's produced by other cells in the body and when it's enriched in a certain area it stimulates more production of red blood cells.

这种蛋白由体内的另一种细胞生成,而当其在某处富集时,就会刺激红细胞生成

耶鲁公开课 - 生物医学工程探索课程节选