“Let's say we ask 100 people, all same age, all same gender, to start a marathon training program at the age of 20 years,” Dr. Volders wrote in an e-mail.
他在一封邮件中说：“打个比方，如果我们让100名性别相同，年龄都是20岁的年轻人开始马拉松训练。”
“Let's say we ask 100 people, all same age, all same gender, to start a marathon training program at the age of 20 years,” Dr. Volders wrote in an e-mail.
他在一封邮件中说：“打个比方，如果我们让100名性别相同，年龄都是20岁的年轻人开始马拉松训练。”
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