His arms are swabbed with alcohol , and two intravenous tubes are inserted , one in each arm .
用酒精擦拭手臂消毒，两手臂静脉各插着一根软管。
Researchers collected the male scents by rubbing glass beads on the bottom of each participant 's foot , and swabbed the same skin for microbes .
研究人员通过玻璃珠摩擦实验人员的脚底收集了每个人的气味，并在米个人的体表涂上同样的微生物。
The researchers sampled water flowing from the shower heads , then removed them , swabbed the interiors of the devices and separately sampled water flowing from the pipes without the shower heads .
研究者从淋浴喷头流水取样，然后移开它们，器具内部用拭子取样并把没有喷头的管中分别取流水样品。
Researchers measured the body mass of 29 obese adults and 45 who were not obese . They also swabbed dna samples from inside their cheeks , had them fill in eating questionnaires and had them perform a series of tasks .
When the researchers swabbed and tested 50 shower heads from nine cities in seven different states in the us , including new york city and denver , they found 30 % of the devices posed a potential risk .
