The South Pole Telescope, which began scientific observations in 2007, surveys the sky for cosmic microwave background radiation, the "afterglow" of the Big Bang.

南极望远镜2007年开始工作。 它的作用是观察宇宙微波背景辐射，这是宇宙大爆炸的“余辉”。

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Employees take exams or demonstrate to managers that they have mastered certain skills, such as analyzing air samples and performing radiation surveys.

WSJ: Fine-Tuning the Perfect Employee