参观者隔着平板玻璃橱窗欣赏那幅画。Visitors see the painting from behind a plate glass window.参观者带来的收入使得这个博物馆能够独立运营。The income from visitors makes the museum self-supporting.参观者川流不息地进入展览厅.Visitors entered the exhibition hall in a steady s...
本节只讨论其中的两类: 金属离子钝化剂和过氧化物分解剂.Only two types will be included in present discussion: metal - ion deactivators and peroxide decomposers.为方便起见,材料分为三大类: 金属, 塑料或聚合物和陶瓷.It is convenient to divide materials into three main types...