1. Of the current staff, 5,000 are employed on a temporary basis, he said.
    "他说目前的员工中5,000人是临时雇佣的。

2. It does not sell a product that you can own but provides services on a temporary basis.
    它并不出售你可以拥有的产品，而是提供暂时的服务。

3. In fact, there is no scientific basis for theories pushing the genetic superiority of any one population over another.
    实际上，那种认为某一种群比另一种群的基因更优越的理论是毫无科学根据的。