But in Boston, where more than 250,000 students attend college, the lure of a few dollars is enough to get scads of them to become lab rats and contribute to science in a ery personal, if brief, way.

• 但是在波士顿有超过25万大学生，许多人因为很少的钱而去做实验受试者，简单的说就是以个人化的形式为科学做贡献。