The living organisms somehow concentrated the minerals by biological processes.生命体通过某种生物过程聚集矿物质。Biological systems have been doing this for billions of years.生物系统亿万年来一直都是这样。Most young women feel a biological need to proc...
Other industries have had to sack managers to reduce administrative costs.其他行业只得精简管理人员以减少行政开支。In practice a graduate tax is an administrative nightmare.毕业税具体操作起来不啻一场行政噩梦。He is among the few aspirants with administrative ...