他们会帮你铲除门前积雪、成为学校活动的志愿者和训练小篮球队等---这三项马克全部都参加。
They are the types who shovel your snow, volunteer for school events, and coach the baseball little league – Mark has done all three.
根据后来的报告显示，当时志愿者们都认为他们是在参加一个关于人体工程学的实验，没人想到这些数字可能与某些单词存在关联。
Volunteers believed they were participating in a study on ergonomics—in the debriefing afterward, none had any idea that the numbers might relate to words.
对于医学研究人员也是同样情形。他们招募志愿者参加临床试验，主要是将新药物首次使用于人体的第一阶段试验。
The same is true of medical researchers recruiting volunteers for clinical trials, especially those known as phase I trials, in which a new drug is tested on people for the first time.
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