蜂窝数字分组数据 Cellular digital packet data ; CDPD
酵母基因组数据库 Saccharomyces Genome Database ; YEASTS
分组数据 grouped data ; EGPRS ; integrated data ; PDP PDU
高速分组数据 HRPD ; high-speed packet data ; High Rate Packet Data ; HSPD
分组数据汇聚协议 PDCP ; Packet Data Convergence Protocol
分组数据信道 PDCH ; Packet Data Channel PDCH ; PDCH Packet Data CHannel ; packet data channel
提前舍弃分组数据包 EPD
分组数据服务节点 PDSN ; Packet Data Serving Node
基因组数据库 Genome Database
一组数据可以包含人名和地址。
这两组数据相互矛盾。
然后我们将研究如何绘制一组数据点。
I just wanted to show you this last graph, or this last set of statistics to go from causes of death in the U. S.
我想让你们看的最后一张图,或者说最后一组统计数据,不是关于美国人的死因
Well, a cross-sectional study would mean that you'd get a random group of the population and measure them in 1970 and then take another random group five years later and measure them, but it wouldn't be the same people necessarily, it would be different groups of people.
那么,横断面研究就是,1970年你在人群中随意选择一组人,并记录下相关数据,然后,五年后再随意选择一组人记录数据,但这不需要是同一组人,通常是不同的人
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