We had previously observed lower concentrations of some brain metabolites, markers of brain injury, in healthy non-alcohol dependent people with BMIs in the overweight to obese range.

我们之前在健康不酗酒的人群中选择bmi指数在超重和肥胖之间的，发现一些低浓度的脑部代谢物，这是脑损伤的标志。

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Reduced lung function growth is also linked to NO2 at concentrations currently measured (or observed) in cities of Europe and North America.

目前在欧洲和北美一些城市中肺功能减弱现象的增加也与目前测量(或观察到)的二氧化氮的浓度有关。

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Colon transit of every group was observed by colonic transit test Plasma nt concentrations were observed by radioimmunoassy (RIA).

运用结肠运输实验观察各年龄组结肠运输情况，采用放免法测定其餐前后血中nt的浓度。

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"We used computer models to simulate the climate forcing impact of the observed changes in soot concentrations in Greenland snow during the past 215 years, " said co-author Mark Flanner from the University of California.

BBC: Human activities have left a visible mark on the Arctic

"Greenhouse gas concentrations have reached record levels despite the economic slowdown, " observed WMO secretary-general Michel Jarraud.

BBC: Modest hopes for climate summit, as gas levels rise