These normally have small gaps between them and have a negative electrical charge, both of which prevents large molecules from filtering through.

通常在它们之间具有小间隙，并带有负电荷，这两者都是为了防止大分子滤过。

In the latest study, Clare and her team tested air filters from two measuring stations, one in London and one in Scotland.

在最新的研究中，克莱尔和她的团队测试了两个监测站的空气过滤器，这两个监测站分别在伦敦和苏格兰。

28. We can put these filters into waste pipes from industrial processes and use the filters to trap heavy metals, like mercury and zinc.

我们可以把这些过滤器放进工业工序的废物管道中，用这些过滤器困住像汞和锌这样的重金属。

At the same time, a more open-plan children's room on the basement level invites interaction while preventing noise from filtering upward and disturbing those concentrating in the lofty perches above.

同时，地下一层的大开间儿童阅读区利于互动，又避免了吵闹声向上传递，打扰高处潜心阅读的人。

Food, lint and other unwanted contaminants can gunk up filters and zap performance from your appliances, said Katie Sadler, a brand manager for Whirlpool's kitchen and cooking line.

Whirlpool 厨房和烹饪系列的品牌经理 Katie Sadler 说， 食物、棉绒和其他不需要的污染物会破坏过滤器并降低电器的性能。