And another way that we can use 'filter' is that people — sometimes when they leave a building, they may leave in a, sort of, small line — a thin line — and we say they are 'filtering out' of the building.
我们使用“filter”的另一种方式是,人们——有时当他们离开一栋建筑物时,他们可能会排成一队离开——细长的队伍——我们会说他们正
陆续离开这栋建筑。