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 .

研究人员测量了29名肥胖成年人与45名不肥胖的成年人的体重，还用棉签从他们的脸颊内侧擦取了dna样本，让他们填写关于吃东西的调查问卷，并让他们完成一系列任务。

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 .

研究者就来自美国七个州九个城市的五十个喷头进行了擦拭与测试，其中包括纽约和丹佛的喷头，发现有三成的喷头有潜在威胁。