But only recently have enough good data been collected from enough places to carry out the sort of analysis dr hallal and his colleagues have engaged in .
但直到最近，hallal博士和他的同事才从足够多的地区收集到了充足的数据来进行这类分析研究。
The study it describes , led by pedro hallal of the federal university of pelotas , is the most complete portrait yet of the world 's busy bees and couch potatoes .
