Just 90 seconds of spinning is enough to separate a blood sample into red and white blood cells, platelets and plasma.

只需 90 秒的旋转就足以将血液样本分离成红细胞和白细胞、血小板和血浆。

How could both happen? Well, first, unemployment is based on a survey of households, the jobs number, on a separate sample of employers, the so- called establishment survey.

两者怎么会发生？首先，失业是基于对家庭、工作数量的调查，根据雇主的单独抽样调查，即所谓的机构调查。